PHP 在后台进程完成后启动脚本？

Question

我正在使用 PDF2SWF 转换 PDF 并使用 XPDF 建立索引.. 使用 exec.. 只是这需要非常长的执行时间。

是否可以将其作为后台进程运行，然后在完成转换后启动脚本？

Answer 1

一般情况下，php是没有实现线程的。

但是有一个 ZF 级可能适合你:

http://framework.zend.com/manual/en/zendx.console.process.unix.overview.html

ZendX_Console_Process_Unix allows developers to spawn an object as a new process, and so do multiple tasks in parallel on console environments. Through its specific nature, it is only working on nix based systems like Linux, Solaris, Mac/OSx and such. Additionally, the shmop_, pcntl_* and posix_* modules are required for this component to run. If one of the requirements is not met, it will throw an exception after instantiating the component.

合适的例子:

class MyProcess extends ZendX_Console_Process_Unix
{
    protected function _run()
    {
        // doing pdf and flash stuff
    }
}

$process1 = new MyProcess();
$process1->start();

while ($process1->isRunning()) {

    sleep(1);

}

echo 'Process completed';

.