i tried all i.e : - Move php_pthreads.dll to the 'bin\php\ext\' directory. - Move pthreadVC2.dll to the 'bin\php\' directory. - Move pthreadVC2.dll to the 'bin\apache\bin' directory. - Move pthreadVC2.dll to the 'C:\windows\system32' directory. - 'extension=php_pthreads.dll' placed the line in php.ini
and after all i also restarted xampp but still error Class 'Thread' not found