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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 |
|---|---|
| 777 | $r .= "\n\t\t<input name='deletemeta[{$entry['meta_id']}]' type='submit' "; |
| 778 | $r .= "class='delete:the-list:meta-{$entry['meta_id']}::_ajax_nonce=$delete_nonce deletemeta' tabindex='6' value='".attribute_escape(__( 'Delete' ))."' />"; |
| 779 | $r .= wp_nonce_field( 'change-meta', '_ajax_nonce', false, false ); |
| 780 | $r .= "</td>\n\t</tr>"; |
| 781 | return $r; |
| 782 | } |
| 783 | |
| 784 | function meta_form() { |
| 785 | global $wpdb; |
| 786 | $limit = (int) apply_filters( 'postmeta_form_limit', 30 ); |
| 787 | $keys = $wpdb->get_col( " |
| 788 | SELECT meta_key |
| 789 | FROM $wpdb->postmeta |
| 790 | WHERE meta_key NOT LIKE '\_%' |
| 791 | GROUP BY meta_key |
| 792 | ORDER BY meta_id DESC |
| 793 | LIMIT $limit" ); |
| 794 | if ( $keys ) |
| 795 | natcasesort($keys); |