pthread not working in php

Question

I have downloaded the PHP Pthreads dll file from http://windows.php.net/downloads/pecl/releases/pthreads/ and enabled it in php.ini as below:

extension=pthreadVC2.dll
extension=php_pthreads.dll

I have used below sample code:

<?php
class AsyncOperation extends Thread 
{
    public function __construct($arg){
        $this->arg = $arg;
    }

    public function run(){
        if($this->arg){
            printf("Hello %s\n", $this->arg);
        }
    }
}

$thread = new AsyncOperation("World");
if($thread->start())
    $thread->join();

when i executed the code i get the following error:

Fatal error: Class 'Thread' not found in C:\htdocs\threads\AsyncOperation.php on line 2 Call Stack: 0.0008 333464 1. {main}() C:\htdocs\threads\AsyncOperation.php:0

Answer 1

There are two issues here:

1) First have to look for dll files location correctly. dll files should be placed as below:

C:\PHP5\pthreadVC2.dll
C:\PHP5\ext\php_pthreads.dll

and in php.ini file only php_pthreads.dll should be enabled as

extension=php_pthreads.dll

2) Have to look for Versions of PHP and dll file.

My PHP is VC6 build and dll file used is VC9. Thats why module didn't get installed. I came to know this difference by using "php -m".

Since there is no VC6 build of dll file, I have used VC9 build of PHP and used pthreads and the program is working perfectly.

Note:The above two solutions solved my problems. But if you are still getting errors check if you have debuggers enabled xdebug or zend. Disable them and try again.

Answer 2

If you have installed PHP on a different folder rather than C:/PHP5, it is good to add pthreadVC2.dll to httpd.conf. Otherwise, pthreads extension module can not find it.

LoadFile "c:/not_default_php5/pthreadVC2.dll"

NOTE: If after adding LoadFile, still Apache can not find DLL, just remove the Loadfile line and copy the DLL to Apache bin folder.

c:/apache_home/bin/pthreadVC2.dll