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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 |
|---|---|
| 3328 | $ext = preg_replace( '/^.+?\.([^.]+)$/', '$1', $src ); |
| 3329 | if ( $ext ) { |
| 3330 | $ext_type = wp_ext2type( $ext ); |
| 3331 | if ( 'audio' === $ext_type || 'video' === $ext_type ) { |
| 3332 | $type = $ext_type; |
| 3333 | } |
| 3334 | } |
| 3335 | |
| 3336 | /** This filter is documented in wp-admin/includes/media.php */ |
| 3337 | $html = apply_filters( "{$type}_send_to_editor_url", $html, $src, $link_text ); |
| 3338 | |
| 3339 | wp_send_json_success( $html ); |
| 3340 | } |
| 3341 | |
| 3342 | /** |
| 3343 | * Ajax handler for the Heartbeat API. |
| 3344 | * |
| 3345 | * Runs when the user is logged in. |
| 3346 | * |