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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 |
|---|---|
| 1328 | $pinged = get_pung($post_id); |
| 1329 | if ( empty($to_ping) ) { |
| 1330 | $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET to_ping = '' WHERE ID = %d", $post_id) ); |
| 1331 | return; |
| 1332 | } |
| 1333 | |
| 1334 | if ( empty($post->post_excerpt) ) |
| 1335 | $excerpt = apply_filters('the_content', $post->post_content); |
| 1336 | else |
| 1337 | $excerpt = apply_filters('the_excerpt', $post->post_excerpt); |
| 1338 | $excerpt = str_replace(']]>', ']]>', $excerpt); |
| 1339 | $excerpt = wp_html_excerpt($excerpt, 252) . '...'; |
| 1340 | |
| 1341 | $post_title = apply_filters('the_title', $post->post_title); |
| 1342 | $post_title = strip_tags($post_title); |
| 1343 | |
| 1344 | if ( $to_ping ) { |
| 1345 | foreach ( (array) $to_ping as $tb_ping ) { |
| 1346 | $tb_ping = trim($tb_ping); |