DowngradeJsonValidateRector

-json_validate('{"foo": "bar"}');
+$jsonValidate = function (string $json, int $depth = 512, int $flags = 0) {
+    if (function_exists('json_validate'))  {
+        return json_validate($json, $depth, $flags);
+    }
+
+    $maxDepth = 0x7FFFFFFF;
+
+    if (0 !== $flags && \defined('JSON_INVALID_UTF8_IGNORE') && \JSON_INVALID_UTF8_IGNORE !== $flags) {
+        throw new \ValueError('json_validate(): Argument #3 ($flags) must be a valid flag (allowed flags: JSON_INVALID_UTF8_IGNORE)');
+    }
+
+    if ($depth <= 0) {
+        throw new \ValueError('json_validate(): Argument #2 ($depth) must be greater than 0');
+    }
+
+    if ($depth > $maxDepth) {
+        throw new \ValueError(sprintf('json_validate(): Argument #2 ($depth) must be less than %d', $maxDepth));
+    }
+
+    json_decode($json, true, $depth, $flags);
+    return \JSON_ERROR_NONE === json_last_error();
+};
+$jsonValidate('{"foo": "bar"}');