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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 |
|---|---|
| 1510 | require_once ABSPATH . WPINC . '/functions.php'; |
| 1511 | } |
| 1512 | |
| 1513 | $jsonp_callback = $_GET['_jsonp']; |
| 1514 | if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { |
| 1515 | return false; |
| 1516 | } |
| 1517 | |
| 1518 | /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ |
| 1519 | $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); |
| 1520 | |
| 1521 | return $jsonp_enabled; |
| 1522 | |
| 1523 | } |
| 1524 | |
| 1525 | /** |
| 1526 | * Checks whether current request is an XML request, or is expecting an XML response. |
| 1527 | * |
| 1528 | * @since 5.2.0 |