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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 |
|---|---|
| 1767 | |
| 1768 | if ( empty($post->post_excerpt) ) |
| 1769 | $excerpt = apply_filters('the_content', $post->post_content, $post->ID); |
| 1770 | else |
| 1771 | $excerpt = apply_filters('the_excerpt', $post->post_excerpt); |
| 1772 | $excerpt = str_replace(']]>', ']]>', $excerpt); |
| 1773 | $excerpt = wp_html_excerpt($excerpt, 252, '…'); |
| 1774 | |
| 1775 | /** This filter is documented in wp-includes/post-template.php */ |
| 1776 | $post_title = apply_filters('the_title', $post->post_title, $post->ID); |
| 1777 | $post_title = strip_tags($post_title); |
| 1778 | |
| 1779 | if ( $to_ping ) { |
| 1780 | foreach ( (array) $to_ping as $tb_ping ) { |
| 1781 | $tb_ping = trim($tb_ping); |
| 1782 | if ( !in_array($tb_ping, $pinged) ) { |
| 1783 | trackback($tb_ping, $post_title, $excerpt, $post_id); |
| 1784 | $pinged[] = $tb_ping; |
| 1785 | } else { |