Changeset 34926

Timestamp:

10/08/2015 01:29:50 AM (9 years ago)

Author:

rmccue

Message:

REST API: Add JsonSerializable compatibility to wp_json_encode

Following on from r34845, the JsonSerializable shim needs support
on the encoding side too. _wp_json_prepare_data handles this when
we've loaded the shim.

Props chriscct7.

See #33982.

File:

• trunk/src/wp-includes/functions.php (modified) (2 diffs)

trunk/src/wp-includes/functions.php

@@ -2691 +2691 @@
     }
 
+    // Prepare the data for JSON serialization.
+    $data = _wp_json_prepare_data( $data );
+
     $json = @call_user_func_array( 'json_encode', $args );
 
@@ -2801 +2804 @@
     } else {
         return wp_check_invalid_utf8( $string, true );
+    }
+}
+
+/**
+ * Prepares response data to be serialized to JSON.
+ *
+ * This supports the JsonSerializable interface for PHP 5.2-5.3 as well.
+ *
+ * @ignore
+ * @since 4.4.0
+ * @access private
+ *
+ * @param mixed $data Native representation.
+ * @return bool|int|float|null|string|array Data ready for `json_encode()`.
+ */
+function _wp_json_prepare_data( $data ) {
+    if ( ! defined( 'WP_JSON_SERIALIZE_COMPATIBLE' ) || WP_JSON_SERIALIZE_COMPATIBLE === false ) {
+        return $data;
+    }
+
+    switch ( gettype( $data ) ) {
+        case 'boolean':
+        case 'integer':
+        case 'double':
+        case 'string':
+        case 'NULL':
+            // These values can be passed through.
+            return $data;
+
+        case 'array':
+            // Arrays must be mapped in case they also return objects.
+            return array_map( '_wp_json_prepare_data', $data );
+
+        case 'object':
+            // If this is an incomplete object (__PHP_Incomplete_Class), bail.
+            if ( ! is_object( $data ) ) {
+                return null;
+            }
+
+            if ( $data instanceof JsonSerializable ) {
+                $data = $data->jsonSerialize();
+            } else {
+                $data = get_object_vars( $data );
+            }
+
+            // Now, pass the array (or whatever was returned from jsonSerialize through).
+            return _wp_json_prepare_data( $data );
+
+        default:
+            return null;
     }
 }