Archived
148 lines
3.8 KiB
PHP
148 lines
3.8 KiB
PHP
<?php
|
|
/**
|
|
* @package Frontend
|
|
*/
|
|
|
|
if ( !defined('WPSEO_VERSION') ) {
|
|
header('HTTP/1.0 403 Forbidden');
|
|
die;
|
|
}
|
|
|
|
/**
|
|
* This class handles the Twitter card functionality.
|
|
*/
|
|
class WPSEO_Twitter extends WPSEO_Frontend {
|
|
|
|
/**
|
|
* @var array $options Holds the options for the Twitter Card functionality
|
|
*/
|
|
var $options;
|
|
|
|
/**
|
|
* Class constructor
|
|
*/
|
|
public function __construct() {
|
|
$this->options = get_option( 'wpseo_social' );
|
|
|
|
add_action( 'wpseo_head', array( $this, 'twitter' ), 40 );
|
|
}
|
|
|
|
/**
|
|
* Outputs the Twitter Card code on singular pages.
|
|
*
|
|
* @return false Only shows on singular pages, false on non-singular pages.
|
|
*/
|
|
public function twitter() {
|
|
if ( !is_singular() )
|
|
return false;
|
|
|
|
wp_reset_query();
|
|
|
|
$this->type();
|
|
$this->site_twitter();
|
|
$this->author_twitter();
|
|
// No need to show these when OpenGraph is also showing, as it'd be the same contents and Twitter
|
|
// would fallback to OpenGraph anyway.
|
|
$this->image();
|
|
$options = get_wpseo_options();
|
|
|
|
$this->twitter_description();
|
|
|
|
if ( !isset( $options['opengraph'] ) || !$options['opengraph'] ) {
|
|
$this->twitter_title();
|
|
$this->twitter_url();
|
|
}
|
|
|
|
do_action( 'wpseo_twitter' );
|
|
}
|
|
|
|
/**
|
|
* Display the Twitter card type.
|
|
*
|
|
* This defaults to summary but can be filtered using the <code>wpseo_twitter_card_type</code> filter.
|
|
*/
|
|
public function type() {
|
|
echo '<meta name="twitter:card" content="' . apply_filters( 'wpseo_twitter_card_type', 'summary' ) . '"/>' . "\n";
|
|
}
|
|
|
|
/**
|
|
* Displays the Twitter account for the site.
|
|
*/
|
|
public function site_twitter() {
|
|
if ( isset( $this->options['twitter_site'] ) )
|
|
echo '<meta name="twitter:site" content="@' . trim( $this->options['twitter_site'] ) . '"/>' . "\n";
|
|
}
|
|
|
|
/**
|
|
* Displays the authors Twitter account.
|
|
*/
|
|
public function author_twitter() {
|
|
$twitter = trim( get_the_author_meta( 'twitter' ) );
|
|
|
|
if ( $twitter && !empty( $twitter ) )
|
|
echo '<meta name="twitter:creator" content="@' . $twitter . '"/>' . "\n";
|
|
}
|
|
|
|
/**
|
|
* Displays the title for Twitter.
|
|
*
|
|
* Only used when OpenGraph is inactive.
|
|
*/
|
|
public function twitter_title() {
|
|
echo '<meta name="twitter:title" content="' . $this->title( '' ) . '"/>' . "\n";
|
|
}
|
|
|
|
/**
|
|
* Displays the description for Twitter.
|
|
*
|
|
* Only used when OpenGraph is inactive.
|
|
*/
|
|
public function twitter_description() {
|
|
$metadesc = trim( $this->metadesc( false ) );
|
|
if ( empty( $metadesc ) )
|
|
$metadesc = false;
|
|
if ( $metadesc && isset( $options['opengraph'] ) && $options['opengraph'] ) {
|
|
// Already output the same description in opengraph, no need to repeat.
|
|
return;
|
|
} else if ( !$metadesc ) {
|
|
$metadesc = strip_tags( get_the_excerpt() );
|
|
}
|
|
|
|
echo '<meta name="twitter:description" content="' . esc_attr( $metadesc ) . '"/>' . "\n";
|
|
}
|
|
|
|
/**
|
|
* Displays the URL for Twitter.
|
|
*
|
|
* Only used when OpenGraph is inactive.
|
|
*/
|
|
public function twitter_url() {
|
|
echo '<meta name="twitter:url" content="' . $this->canonical( false ) . '"/>' . "\n";
|
|
}
|
|
|
|
/**
|
|
* Displays the image for Twitter
|
|
*
|
|
* Only used when OpenGraph is inactive.
|
|
*/
|
|
public function image() {
|
|
global $post;
|
|
|
|
if ( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail( $post->ID ) ) {
|
|
$featured_img = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), apply_filters( 'wpseo_opengraph_image_size', 'medium' ) );
|
|
|
|
if ( $featured_img ) {
|
|
$img = apply_filters( 'wpseo_opengraph_image', $featured_img[0] );
|
|
echo "<meta name='twitter:image' content='" . esc_attr( $img ) . "'/>\n";
|
|
}
|
|
} else {
|
|
$options = get_wpseo_options();
|
|
if ( isset( $options['og_frontpage_image'] ) && !empty( $options['og_frontpage_image'] ) )
|
|
echo "<meta name='twitter:image' content='" . esc_attr( $options['og_frontpage_image'] ) . "'/>\n";
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
global $wpseo_twitter;
|
|
$wpseo_twitter = new WPSEO_Twitter(); |