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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 |
|---|---|
| 1668 | require_once ABSPATH . WPINC . '/functions.php'; |
| 1669 | } |
| 1670 | |
| 1671 | $jsonp_callback = $_GET['_jsonp']; |
| 1672 | if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { |
| 1673 | return false; |
| 1674 | } |
| 1675 | |
| 1676 | /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ |
| 1677 | $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); |
| 1678 | |
| 1679 | return $jsonp_enabled; |
| 1680 | |
| 1681 | } |
| 1682 | |
| 1683 | /** |
| 1684 | * Checks whether a string is a valid JSON Media Type. |
| 1685 | * |
| 1686 | * @since 5.6.0 |