wp-includes/IXR/class-IXR-server.php:197$methodcalls function multiCall($methodcalls) { // See http://www.xmlrpc.com/discuss/msgReader$1208 $return = array(); foreach ($methodcalls as $call) { $method = $call['methodName']; $params = $call['params']; if ($method == 'system.multicall') { $result = new IXR_Error(-32600, 'Recursive calls to system.multicall are forbidden'); } else { $result = $this->call($method, $params); } if (is_a($result, 'IXR_Error')) { $return[] = array( 'faultCode' => $result->code, 'faultString' => $result->message ); } else { $return[] = array($result); } } return $return; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/IXR/class-IXR-server.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.