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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 |
|---|---|
| 1559 | require_once ABSPATH . WPINC . '/functions.php'; |
| 1560 | } |
| 1561 | |
| 1562 | $jsonp_callback = $_GET['_jsonp']; |
| 1563 | if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { |
| 1564 | return false; |
| 1565 | } |
| 1566 | |
| 1567 | /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ |
| 1568 | $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); |
| 1569 | |
| 1570 | return $jsonp_enabled; |
| 1571 | |
| 1572 | } |
| 1573 | |
| 1574 | /** |
| 1575 | * Checks whether current request is an XML request, or is expecting an XML response. |
| 1576 | * |
| 1577 | * @since 5.2.0 |