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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 |
|---|---|
| 1856 | require_once ABSPATH . WPINC . '/functions.php'; |
| 1857 | } |
| 1858 | |
| 1859 | $jsonp_callback = $_GET['_jsonp']; |
| 1860 | if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { |
| 1861 | return false; |
| 1862 | } |
| 1863 | |
| 1864 | /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ |
| 1865 | $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); |
| 1866 | |
| 1867 | return $jsonp_enabled; |
| 1868 | |
| 1869 | } |
| 1870 | |
| 1871 | /** |
| 1872 | * Checks whether a string is a valid JSON Media Type. |
| 1873 | * |
| 1874 | * @since 5.6.0 |