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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 |
|---|---|
| 3304 | $ext = preg_replace( '/^.+?\.([^.]+)$/', '$1', $src ); |
| 3305 | if ( $ext ) { |
| 3306 | $ext_type = wp_ext2type( $ext ); |
| 3307 | if ( 'audio' == $ext_type || 'video' == $ext_type ) { |
| 3308 | $type = $ext_type; |
| 3309 | } |
| 3310 | } |
| 3311 | |
| 3312 | /** This filter is documented in wp-admin/includes/media.php */ |
| 3313 | $html = apply_filters( "{$type}_send_to_editor_url", $html, $src, $link_text ); |
| 3314 | |
| 3315 | wp_send_json_success( $html ); |
| 3316 | } |
| 3317 | |
| 3318 | /** |
| 3319 | * Ajax handler for the Heartbeat API. |
| 3320 | * |
| 3321 | * Runs when the user is logged in. |
| 3322 | * |