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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 3111 | } else { |
| 3112 | /** This filter is documented in wp-includes/post-template.php */ |
| 3113 | $excerpt = apply_filters( 'the_excerpt', $post->post_excerpt ); |
| 3114 | } |
| 3115 | |
| 3116 | $excerpt = str_replace( ']]>', ']]>', $excerpt ); |
| 3117 | $excerpt = wp_html_excerpt( $excerpt, 252, '…' ); |
| 3118 | |
| 3119 | /** This filter is documented in wp-includes/post-template.php */ |
| 3120 | $post_title = apply_filters( 'the_title', $post->post_title, $post->ID ); |
| 3121 | $post_title = strip_tags( $post_title ); |
| 3122 | |
| 3123 | foreach ( (array) $to_ping as $tb_ping ) { |
| 3124 | $tb_ping = trim( $tb_ping ); |
| 3125 | if ( ! in_array( $tb_ping, $pinged, true ) ) { |
| 3126 | trackback( $tb_ping, $post_title, $excerpt, $post->ID ); |
| 3127 | $pinged[] = $tb_ping; |
| 3128 | } else { |
| 3129 | $wpdb->query( |