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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 |
|---|---|
| 1524 | require_once ABSPATH . WPINC . '/functions.php'; |
| 1525 | } |
| 1526 | |
| 1527 | $jsonp_callback = $_GET['_jsonp']; |
| 1528 | if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { |
| 1529 | return false; |
| 1530 | } |
| 1531 | |
| 1532 | /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ |
| 1533 | $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); |
| 1534 | |
| 1535 | return $jsonp_enabled; |
| 1536 | |
| 1537 | } |
| 1538 | |
| 1539 | /** |
| 1540 | * Checks whether current request is an XML request, or is expecting an XML response. |
| 1541 | * |
| 1542 | * @since 5.2.0 |