Ticket #44534: 44534.3.diff

src/wp-includes/load.php

@@ -333 +333 @@
                 error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );
         }
 
-        if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) || wp_doing_ajax() ) {
+        if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) || wp_doing_ajax() || wp_is_json_request() ) {
                 @ini_set( 'display_errors', 0 );
         }
 }
@@ -1162 +1162 @@
         }
         echo "\n###### wp_scraping_result_end:$scrape_key ######\n";
 }
+
+/**
+ * Check whether current request is a JSON request, or is expecting a JSON response
+ *
+ * @since 5.0.0
+ *
+ * @return bool True if Accepts or Content-Type headers contain application/json, false otherwise
+ */
+function wp_is_json_request() {
+
+        if ( isset( $_SERVER['HTTP_ACCEPT'] ) && strpos( $_SERVER['HTTP_ACCEPT'], 'application/json' ) !== false ) {
+                return true;
+        }
+
+        if ( isset( $_SERVER['CONTENT_TYPE'] ) && 'application/json' === $_SERVER['CONTENT_TYPE'] ) {
+                return true;
+        }
+
+        return false;
+
+}