Archived
800 lines
18 KiB
PHP
800 lines
18 KiB
PHP
<?php
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/**
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* @package WPSEO\Internals
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* @since 1.8.0
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*/
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/**
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* Group of utility methods for use by WPSEO
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* All methods are static, this is just a sort of namespacing class wrapper.
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*/
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class WPSEO_Utils {
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/**
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* @var bool $has_filters Whether the PHP filter extension is enabled
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* @static
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*/
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public static $has_filters;
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/**
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* Holds the options that, when updated, should cause the transient cache to clear
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*
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* @var array
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*/
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private static $cache_clear = array();
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/**
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* Check whether the current user is allowed to access the configuration.
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*
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* @static
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*
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* @return boolean
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*/
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public static function grant_access() {
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if ( ! is_multisite() ) {
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return true;
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}
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$options = get_site_option( 'wpseo_ms' );
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if ( $options['access'] === 'admin' && current_user_can( 'manage_options' ) ) {
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return true;
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}
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if ( $options['access'] === 'superadmin' && ! is_super_admin() ) {
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return false;
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}
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return true;
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}
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/**
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* Check whether file editing is allowed for the .htaccess and robots.txt files
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*
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* @internal current_user_can() checks internally whether a user is on wp-ms and adjusts accordingly.
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*
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* @static
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*
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* @return bool
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*/
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public static function allow_system_file_edit() {
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$allowed = true;
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if ( current_user_can( 'edit_files' ) === false ) {
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$allowed = false;
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}
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/**
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* Filter: 'wpseo_allow_system_file_edit' - Allow developers to change whether the editing of
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* .htaccess and robots.txt is allowed
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*
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* @api bool $allowed Whether file editing is allowed
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*/
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return apply_filters( 'wpseo_allow_system_file_edit', $allowed );
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}
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/**
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* Check if the web server is running on Apache
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*
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* @static
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*
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* @return bool
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*/
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public static function is_apache() {
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if ( isset( $_SERVER['SERVER_SOFTWARE'] ) && stristr( $_SERVER['SERVER_SOFTWARE'], 'apache' ) !== false ) {
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return true;
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}
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return false;
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}
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/**
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* Check if the web server is running on Nginx
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*
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* @static
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*
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* @return bool
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*/
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public static function is_nginx() {
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if ( isset( $_SERVER['SERVER_SOFTWARE'] ) && stristr( $_SERVER['SERVER_SOFTWARE'], 'nginx' ) !== false ) {
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return true;
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}
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return false;
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}
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/**
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* Check whether a url is relative
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*
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* @static
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*
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* @param string $url
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*
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* @return bool
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*/
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public static function is_url_relative( $url ) {
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return ( strpos( $url, 'http' ) !== 0 && strpos( $url, '//' ) !== 0 );
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}
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/**
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* List all the available user roles
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*
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* @static
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*
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* @return array $roles
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*/
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public static function get_roles() {
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global $wp_roles;
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if ( ! isset( $wp_roles ) ) {
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$wp_roles = new WP_Roles();
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}
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$roles = $wp_roles->get_names();
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return $roles;
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}
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/**
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* Standardize whitespace in a string
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*
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* Replace line breaks, carriage returns, tabs with a space, then remove double spaces.
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*
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* @static
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*
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* @param string $string
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*
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* @return string
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*/
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public static function standardize_whitespace( $string ) {
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return trim( str_replace( ' ', ' ', str_replace( array( "\t", "\n", "\r", "\f" ), ' ', $string ) ) );
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}
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/**
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* Strip out the shortcodes with a filthy regex, because people don't properly register their shortcodes.
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*
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* @static
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*
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* @param string $text Input string that might contain shortcodes.
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*
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* @return string $text string without shortcodes
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*/
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public static function strip_shortcode( $text ) {
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return preg_replace( '`\[[^\]]+\]`s', '', $text );
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}
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/**
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* Recursively trim whitespace round a string value or of string values within an array
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* Only trims strings to avoid typecasting a variable (to string)
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*
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* @static
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*
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* @param mixed $value Value to trim or array of values to trim.
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*
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* @return mixed Trimmed value or array of trimmed values
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*/
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public static function trim_recursive( $value ) {
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if ( is_string( $value ) ) {
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$value = trim( $value );
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}
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elseif ( is_array( $value ) ) {
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$value = array_map( array( __CLASS__, 'trim_recursive' ), $value );
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}
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return $value;
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}
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/**
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* Translates a decimal analysis score into a textual one.
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*
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* @static
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*
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* @param int $val The decimal score to translate.
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* @param bool $css_value Whether to return the i18n translated score or the CSS class value.
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*
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* @return string
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*/
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public static function translate_score( $val, $css_value = true ) {
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if ( $val > 10 ) {
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$val = round( $val / 10 );
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}
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switch ( $val ) {
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case 0:
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$score = __( 'N/A', 'wordpress-seo' );
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$css = 'na';
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break;
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case 4:
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case 5:
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$score = __( 'Poor', 'wordpress-seo' );
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$css = 'poor';
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break;
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case 6:
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case 7:
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$score = __( 'OK', 'wordpress-seo' );
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$css = 'ok';
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break;
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case 8:
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case 9:
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case 10:
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$score = __( 'Good', 'wordpress-seo' );
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$css = 'good';
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break;
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default:
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$score = __( 'Bad', 'wordpress-seo' );
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$css = 'bad';
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break;
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}
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if ( $css_value ) {
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return $css;
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}
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else {
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return $score;
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}
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}
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/**
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* Emulate the WP native sanitize_text_field function in a %%variable%% safe way
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*
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* @see https://core.trac.wordpress.org/browser/trunk/src/wp-includes/formatting.php for the original
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*
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* Sanitize a string from user input or from the db
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*
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* check for invalid UTF-8,
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* Convert single < characters to entity,
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* strip all tags,
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* remove line breaks, tabs and extra white space,
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* strip octets - BUT DO NOT REMOVE (part of) VARIABLES WHICH WILL BE REPLACED.
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*
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* @static
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*
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* @param string $value
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*
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* @return string
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*/
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public static function sanitize_text_field( $value ) {
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$filtered = wp_check_invalid_utf8( $value );
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if ( strpos( $filtered, '<' ) !== false ) {
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$filtered = wp_pre_kses_less_than( $filtered );
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// This will strip extra whitespace for us.
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$filtered = wp_strip_all_tags( $filtered, true );
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}
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else {
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$filtered = trim( preg_replace( '`[\r\n\t ]+`', ' ', $filtered ) );
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}
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$found = false;
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while ( preg_match( '`[^%](%[a-f0-9]{2})`i', $filtered, $match ) ) {
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$filtered = str_replace( $match[1], '', $filtered );
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$found = true;
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}
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unset( $match );
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if ( $found ) {
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// Strip out the whitespace that may now exist after removing the octets.
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$filtered = trim( preg_replace( '` +`', ' ', $filtered ) );
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}
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/**
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* Filter a sanitized text field string.
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*
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* @since WP 2.9.0
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*
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* @param string $filtered The sanitized string.
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* @param string $str The string prior to being sanitized.
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*/
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return apply_filters( 'sanitize_text_field', $filtered, $value );
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}
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/**
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* Sanitize a url for saving to the database
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* Not to be confused with the old native WP function
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*
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* @todo [JRF => whomever] check/improve url verification
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*
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* @static
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*
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* @param string $value
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* @param array $allowed_protocols
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*
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* @return string
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*/
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public static function sanitize_url( $value, $allowed_protocols = array( 'http', 'https' ) ) {
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return esc_url_raw( sanitize_text_field( rawurldecode( $value ) ), $allowed_protocols );
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}
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/**
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* Validate a value as boolean
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*
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* @static
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*
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* @param mixed $value
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*
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* @return bool
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*/
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public static function validate_bool( $value ) {
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if ( ! isset( self::$has_filters ) ) {
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self::$has_filters = extension_loaded( 'filter' );
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}
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if ( self::$has_filters ) {
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return filter_var( $value, FILTER_VALIDATE_BOOLEAN );
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}
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else {
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return self::emulate_filter_bool( $value );
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}
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}
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/**
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* Cast a value to bool
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*
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* @static
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*
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* @param mixed $value Value to cast.
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*
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* @return bool
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*/
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public static function emulate_filter_bool( $value ) {
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$true = array(
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'1',
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'true',
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'True',
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'TRUE',
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'y',
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'Y',
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'yes',
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'Yes',
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'YES',
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'on',
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'On',
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'ON',
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);
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$false = array(
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'0',
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'false',
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'False',
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'FALSE',
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'n',
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'N',
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'no',
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'No',
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'NO',
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'off',
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'Off',
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'OFF',
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);
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if ( is_bool( $value ) ) {
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return $value;
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}
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else if ( is_int( $value ) && ( $value === 0 || $value === 1 ) ) {
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return (bool) $value;
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}
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else if ( ( is_float( $value ) && ! is_nan( $value ) ) && ( $value === (float) 0 || $value === (float) 1 ) ) {
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return (bool) $value;
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}
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else if ( is_string( $value ) ) {
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$value = trim( $value );
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if ( in_array( $value, $true, true ) ) {
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return true;
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}
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else if ( in_array( $value, $false, true ) ) {
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return false;
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}
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else {
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return false;
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}
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}
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return false;
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}
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/**
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* Validate a value as integer
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*
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* @static
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*
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* @param mixed $value
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*
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* @return int|bool int or false in case of failure to convert to int
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*/
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public static function validate_int( $value ) {
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if ( ! isset( self::$has_filters ) ) {
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self::$has_filters = extension_loaded( 'filter' );
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}
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if ( self::$has_filters ) {
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return filter_var( $value, FILTER_VALIDATE_INT );
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}
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else {
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return self::emulate_filter_int( $value );
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}
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}
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/**
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* Cast a value to integer
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*
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* @static
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*
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* @param mixed $value Value to cast.
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*
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* @return int|bool
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*/
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public static function emulate_filter_int( $value ) {
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if ( is_int( $value ) ) {
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return $value;
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}
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else if ( is_float( $value ) ) {
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if ( (int) $value == $value && ! is_nan( $value ) ) {
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return (int) $value;
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}
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else {
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return false;
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}
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}
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else if ( is_string( $value ) ) {
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$value = trim( $value );
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if ( $value === '' ) {
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return false;
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}
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else if ( ctype_digit( $value ) ) {
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return (int) $value;
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}
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else if ( strpos( $value, '-' ) === 0 && ctype_digit( substr( $value, 1 ) ) ) {
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return (int) $value;
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}
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else {
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return false;
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}
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}
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return false;
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}
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/**
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* Clears the WP or W3TC cache depending on which is used
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*
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* @static
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*/
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public static function clear_cache() {
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if ( function_exists( 'w3tc_pgcache_flush' ) ) {
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w3tc_pgcache_flush();
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}
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elseif ( function_exists( 'wp_cache_clear_cache' ) ) {
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wp_cache_clear_cache();
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}
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}
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/**
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* Flush W3TC cache after succesfull update/add of taxonomy meta option
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*
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* @todo [JRF => whomever] check the above and this function to see if they should be combined or really
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* do something significantly different
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*
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* @static
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*/
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public static function flush_w3tc_cache() {
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if ( defined( 'W3TC_DIR' ) && function_exists( 'w3tc_objectcache_flush' ) ) {
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w3tc_objectcache_flush();
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}
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}
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/**
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* Clear rewrite rules
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*
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* @static
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*/
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public static function clear_rewrites() {
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delete_option( 'rewrite_rules' );
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}
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/**
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* Adds a hook that when given option is updated, the XML sitemap transient cache is cleared
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*
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* @param string $option
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* @param string $type
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*/
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public static function register_cache_clear_option( $option, $type = '' ) {
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self::$cache_clear[ $option ] = $type;
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add_action( 'update_option', array( 'WPSEO_Utils', 'clear_transient_cache' ) );
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}
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/**
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* Clears the transient cache when a given option is updated, if that option has been registered before
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*
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* @param string $option The option that's being updated.
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*/
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public static function clear_transient_cache( $option ) {
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if ( isset( self::$cache_clear[ $option ] ) ) {
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if ( '' !== self::$cache_clear[ $option ] ) {
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wpseo_invalidate_sitemap_cache( self::$cache_clear[ $option ] );
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}
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else {
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self::clear_sitemap_cache();
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}
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}
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}
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/**
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* Clear entire XML sitemap cache
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*
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* @param array $types
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*/
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public static function clear_sitemap_cache( $types = array() ) {
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global $wpdb;
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if ( wp_using_ext_object_cache() ) {
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return;
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}
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if ( ! apply_filters( 'wpseo_enable_xml_sitemap_transient_caching', true ) ) {
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return;
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}
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// Not sure about efficiency, but that's what code elsewhere does R.
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$options = WPSEO_Options::get_all();
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if ( true !== $options['enablexmlsitemap'] ) {
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return;
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}
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$query = "DELETE FROM $wpdb->options WHERE";
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if ( ! empty( $types ) ) {
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$first = true;
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foreach ( $types as $sitemap_type ) {
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if ( ! $first ) {
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$query .= ' OR ';
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}
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$query .= " option_name LIKE '_transient_wpseo_sitemap_cache_" . $sitemap_type . "_%' OR option_name LIKE '_transient_timeout_wpseo_sitemap_cache_" . $sitemap_type . "_%'";
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$first = false;
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}
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}
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else {
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$query .= " option_name LIKE '_transient_wpseo_sitemap_%' OR option_name LIKE '_transient_timeout_wpseo_sitemap_%'";
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}
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$wpdb->query( $query );
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}
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/**
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* Do simple reliable math calculations without the risk of wrong results
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*
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* @see http://floating-point-gui.de/
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* @see the big red warning on http://php.net/language.types.float.php
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*
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* In the rare case that the bcmath extension would not be loaded, it will return the normal calculation results
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*
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* @static
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*
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* @since 1.5.0
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*
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* @param mixed $number1 Scalar (string/int/float/bool).
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* @param string $action Calculation action to execute. Valid input:
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* '+' or 'add' or 'addition',
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* '-' or 'sub' or 'subtract',
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* '*' or 'mul' or 'multiply',
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* '/' or 'div' or 'divide',
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* '%' or 'mod' or 'modulus'
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* '=' or 'comp' or 'compare'.
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* @param mixed $number2 Scalar (string/int/float/bool).
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* @param bool $round Whether or not to round the result. Defaults to false.
|
|
* Will be disregarded for a compare operation.
|
|
* @param int $decimals Decimals for rounding operation. Defaults to 0.
|
|
* @param int $precision Calculation precision. Defaults to 10.
|
|
*
|
|
* @return mixed Calculation Result or false if either or the numbers isn't scalar or
|
|
* an invalid operation was passed
|
|
* - for compare the result will always be an integer
|
|
* - for all other operations, the result will either be an integer (preferred)
|
|
* or a float
|
|
*/
|
|
public static function calc( $number1, $action, $number2, $round = false, $decimals = 0, $precision = 10 ) {
|
|
static $bc;
|
|
|
|
if ( ! is_scalar( $number1 ) || ! is_scalar( $number2 ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( ! isset( $bc ) ) {
|
|
$bc = extension_loaded( 'bcmath' );
|
|
}
|
|
|
|
if ( $bc ) {
|
|
$number1 = number_format( $number1, 10, '.', '' );
|
|
$number2 = number_format( $number2, 10, '.', '' );
|
|
}
|
|
|
|
$result = null;
|
|
$compare = false;
|
|
|
|
switch ( $action ) {
|
|
case '+':
|
|
case 'add':
|
|
case 'addition':
|
|
$result = ( $bc ) ? bcadd( $number1, $number2, $precision ) /* string */ : ( $number1 + $number2 );
|
|
break;
|
|
|
|
case '-':
|
|
case 'sub':
|
|
case 'subtract':
|
|
$result = ( $bc ) ? bcsub( $number1, $number2, $precision ) /* string */ : ( $number1 - $number2 );
|
|
break;
|
|
|
|
case '*':
|
|
case 'mul':
|
|
case 'multiply':
|
|
$result = ( $bc ) ? bcmul( $number1, $number2, $precision ) /* string */ : ( $number1 * $number2 );
|
|
break;
|
|
|
|
case '/':
|
|
case 'div':
|
|
case 'divide':
|
|
if ( $bc ) {
|
|
$result = bcdiv( $number1, $number2, $precision ); // String, or NULL if right_operand is 0.
|
|
}
|
|
elseif ( $number2 != 0 ) {
|
|
$result = ( $number1 / $number2 );
|
|
}
|
|
|
|
if ( ! isset( $result ) ) {
|
|
$result = 0;
|
|
}
|
|
break;
|
|
|
|
case '%':
|
|
case 'mod':
|
|
case 'modulus':
|
|
if ( $bc ) {
|
|
$result = bcmod( $number1, $number2, $precision ); // String, or NULL if modulus is 0.
|
|
}
|
|
elseif ( $number2 != 0 ) {
|
|
$result = ( $number1 % $number2 );
|
|
}
|
|
|
|
if ( ! isset( $result ) ) {
|
|
$result = 0;
|
|
}
|
|
break;
|
|
|
|
case '=':
|
|
case 'comp':
|
|
case 'compare':
|
|
$compare = true;
|
|
if ( $bc ) {
|
|
$result = bccomp( $number1, $number2, $precision ); // Returns int 0, 1 or -1.
|
|
}
|
|
else {
|
|
$result = ( $number1 == $number2 ) ? 0 : ( ( $number1 > $number2 ) ? 1 : - 1 );
|
|
}
|
|
break;
|
|
}
|
|
|
|
if ( isset( $result ) ) {
|
|
if ( $compare === false ) {
|
|
if ( $round === true ) {
|
|
$result = round( floatval( $result ), $decimals );
|
|
if ( $decimals === 0 ) {
|
|
$result = (int) $result;
|
|
}
|
|
}
|
|
else {
|
|
$result = ( intval( $result ) == $result ) ? intval( $result ) : floatval( $result );
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Wrapper for the PHP filter input function.
|
|
*
|
|
* This is used because stupidly enough, the `filter_input` function is not available on all hosts...
|
|
*
|
|
* @param int $type
|
|
* @param string $variable_name
|
|
* @param int $filter
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public static function filter_input( $type, $variable_name, $filter = FILTER_DEFAULT ) {
|
|
return filter_input( $type, $variable_name, $filter );
|
|
}
|
|
|
|
/**
|
|
* Trim whitespace and NBSP (Non-breaking space) from string
|
|
*
|
|
* @param string $string
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function trim_nbsp_from_string( $string ) {
|
|
$find = array( ' ', chr( 0xC2 ) . chr( 0xA0 ) );
|
|
$string = str_replace( $find, ' ', $string );
|
|
$string = trim( $string );
|
|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Check if a string is a valid datetime
|
|
*
|
|
* @param string $datetime
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function is_valid_datetime( $datetime ) {
|
|
if ( substr( $datetime, 0, 1 ) != '-' ) {
|
|
try {
|
|
// Use the DateTime class ( PHP 5.2 > ) to check if the string is a valid datetime.
|
|
if ( new DateTime( $datetime ) !== false ) {
|
|
return true;
|
|
}
|
|
}
|
|
catch ( Exception $exc ) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Format the URL to be sure it is okay for using as a redirect url.
|
|
*
|
|
* This method will parse the URL and combine them in one string.
|
|
*
|
|
* @param string $url
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public static function format_url( $url ) {
|
|
$parsed_url = parse_url( $url );
|
|
|
|
$formatted_url = '';
|
|
if ( ! empty( $parsed_url['path'] ) ) {
|
|
$formatted_url = $parsed_url['path'];
|
|
}
|
|
|
|
// Prepend a slash if first char != slash.
|
|
if ( stripos( $formatted_url, '/' ) !== 0 ) {
|
|
$formatted_url = '/' . $formatted_url;
|
|
}
|
|
|
|
// Append 'query' string if it exists.
|
|
if ( isset( $parsed_url['query'] ) && '' != $parsed_url['query'] ) {
|
|
$formatted_url .= '?' . $parsed_url['query'];
|
|
}
|
|
|
|
return apply_filters( 'wpseo_format_admin_url', $formatted_url );
|
|
}
|
|
|
|
|
|
/**
|
|
* Get plugin name from file
|
|
*
|
|
* @param string $plugin
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function get_plugin_name( $plugin ) {
|
|
$plugin_details = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
|
|
|
|
if ( $plugin_details['Name'] != '' ) {
|
|
return $plugin_details['Name'];
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
} /* End of class WPSEO_Utils */
|