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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 |
---|---|
2696 | } |
2697 |
|
2698 | // Figure out what filter to run: |
2699 | $type = 'file'; |
2700 | if ( ( $ext = preg_replace( '/^.+?\.([^.]+)$/', '$1', $src ) ) && ( $ext_type = wp_ext2type( $ext ) ) |
2701 | && ( 'audio' == $ext_type || 'video' == $ext_type ) ) |
2702 | $type = $ext_type; |
2703 |
|
2704 | /** This filter is documented in wp-admin/includes/media.php */ |
2705 | $html = apply_filters( $type . '_send_to_editor_url', $html, $src, $link_text ); |
2706 |
|
2707 | wp_send_json_success( $html ); |
2708 | } |
2709 |
|
2710 | /** |
2711 | * Ajax handler for the Heartbeat API. |
2712 | * |
2713 | * Runs when the user is logged in. |
2714 | * |