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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 |
|---|---|
| 1623 | require_once ABSPATH . WPINC . '/functions.php'; |
| 1624 | } |
| 1625 | |
| 1626 | $jsonp_callback = $_GET['_jsonp']; |
| 1627 | if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { |
| 1628 | return false; |
| 1629 | } |
| 1630 | |
| 1631 | /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ |
| 1632 | $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); |
| 1633 | |
| 1634 | return $jsonp_enabled; |
| 1635 | |
| 1636 | } |
| 1637 | |
| 1638 | /** |
| 1639 | * Checks whether a string is a valid JSON Media Type. |
| 1640 | * |
| 1641 | * @since 5.6.0 |