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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 |
|---|---|
| 2756 | } |
| 2757 | |
| 2758 | // Figure out what filter to run: |
| 2759 | $type = 'file'; |
| 2760 | if ( ( $ext = preg_replace( '/^.+?\.([^.]+)$/', '$1', $src ) ) && ( $ext_type = wp_ext2type( $ext ) ) |
| 2761 | && ( 'audio' == $ext_type || 'video' == $ext_type ) ) |
| 2762 | $type = $ext_type; |
| 2763 | |
| 2764 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2765 | $html = apply_filters( "{$type}_send_to_editor_url", $html, $src, $link_text ); |
| 2766 | |
| 2767 | wp_send_json_success( $html ); |
| 2768 | } |
| 2769 | |
| 2770 | /** |
| 2771 | * Ajax handler for the Heartbeat API. |
| 2772 | * |
| 2773 | * Runs when the user is logged in. |
| 2774 | * |