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    Checks if the current request is a WP REST API request.
  
        
  
    
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  | if (!function_exists('is_rest')) { | |
| /** | |
| * Checks if the current request is a WP REST API request. | |
| * | |
| * Case #1: After WP_REST_Request initialisation | |
| * Case #2: Support "plain" permalink settings | |
| * Case #3: URL Path begins with wp-json/ (your REST prefix) | |
| * | |
| * @returns boolean | |
| * @author matzeeable | |
| */ | |
| function is_rest() { | |
| $prefix = rest_get_url_prefix( ); | |
| if (defined('REST_REQUEST') && REST_REQUEST // (#1) | |
| || isset($_GET['rest_route']) // (#2) | |
| && strpos( trim( $_GET['rest_route'], '\\/' ), $prefix , 0 ) === 0) | |
| return true; | |
| // (#3) | |
| $rest_url = wp_parse_url( site_url( $prefix ) ); | |
| $current_url = wp_parse_url( home_url( add_query_arg( array( ) ) ) ); | |
| return strpos( $current_url['path'], $rest_url['path'], 0 ) === 0; | |
| } | |
| } | 
  
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