Fatal error: Cannot use 'String' as class name as it is reserved in /usr/share/php5/cake/2.4.4/lib/Cake/Utility/String.php on line 25

Fatal error: Uncaught Error: Class 'String' not found in /usr/share/php5/cake/2.4.4/lib/Cake/Utility/Debugger.php:340 Stack trace: #0 /usr/share/php5/cake/2.4.4/lib/Cake/Utility/Debugger.php(743): Debugger::trace(Array) #1 /usr/share/php5/cake/2.4.4/lib/Cake/Error/ErrorHandler.php(219): Debugger->outputError(Array) #2 [internal function]: ErrorHandler::handleError(2, 'file_put_conten...', '/usr/share/php5...', 142, Array) #3 /usr/share/php5/cake/2.4.4/lib/Cake/Log/Engine/FileLog.php(142): file_put_contents('/var/www/bajan....', '2018-02-17 19:4...', 8) #4 /usr/share/php5/cake/2.4.4/lib/Cake/Log/CakeLog.php(452): FileLog->write('error', 'Fatal Error (64...') #5 /usr/share/php5/cake/2.4.4/lib/Cake/Error/ErrorHandler.php(240): CakeLog::write('error', 'Fatal Error (64...') #6 /usr/share/php5/cake/2.4.4/lib/Cake/Error/ErrorHandler.php(203): ErrorHandler::handleFatalError(64, 'Cannot use 'Str...', '/usr/share/php5...', 25) #7 /usr/share/php5/cake/2.4.4/lib/Cake/Core/App.php(929): ErrorHandler::handleError(64, 'Cannot use 'Str.. in /usr/share/php5/cake/2.4.4/lib/Cake/Utility/Debugger.php on line 340