PHP用proc_open新建子进程使用管道通信非阻塞执行PHP脚本

原创
2016/09/11 21:29
阅读数 6K

PHP用proc_open新建子进程使用管道通信非阻塞执行PHP脚本.
脚本结束时register_shutdown_function回调函数访问管道获取子进程输出的数据.

例子1(popen):
<?php
function foo() {
	echo date('Y-m-d H:i:s')."\n";
	echo shell_exec('php -r \'sleep(1); echo date("Y-m-d H:i:s")." by shell_exec:blocking\n";\'');       //阻塞
	$pipe1 =  popen('php -r \'sleep(2); echo date("Y-m-d H:i:s")." by popen1:non-blocking\n";\'', 'r');  //非阻塞(管道)
	$pipe2 =  popen('php -r \'sleep(1); echo date("Y-m-d H:i:s")." by popen2:non-blocking\n";\'', 'r');  //非阻塞(管道)
	echo date('Y-m-d H:i:s')."\n";
	register_shutdown_function(function() use ($pipe1, $pipe2) { //事件驱动(脚本结束事件),异步回调
		echo stream_get_contents($pipe1); //输出子进程返回的数据
		echo stream_get_contents($pipe2); //输出子进程返回的数据
		pclose($pipe1);
		pclose($pipe2);
	});
}
foo();
//输出
2016-09-11 20:25:30
2016-09-11 20:25:31 by shell_exec:blocking
2016-09-11 20:25:31
2016-09-11 20:25:33 by popen1:non-blocking
2016-09-11 20:25:32 by popen2:non-blocking

例子2(proc_open):
<?php
function foo() {
	$proc = proc_open(
		//task.php 内容为 $arr = unserialize(stream_get_contents(STDIN)); $arr['time'] = date('Y-m-d H:i:s', $arr['time']); echo serialize($arr);
		'/png/php/5.4.45/bin/php /home/eechen/task.php', 
		array(
			0 => array('pipe','r'), //stdin (用fwrite写入数据给管道)
			1 => array('pipe','w'), //stdout(用stream_get_contents获取管道输出)
			2 => array('pipe','w'), //stderr(用stream_get_contents获取管道输出)
			//2 => array('file','/tmp/err.txt','a') //stderr(写入到文件)
		), 
		$pipes, //管道(stdin/stdout/stderr)
		'/tmp', //当前PHP进程的工作目录
		array('foo' => 'bar') //php.ini 配置 variables_order = "EGPCS" 其中E表示$_ENV,否则$_ENV输出为空
	);
	//var_dump($pipes); //resource of type (stream)
	if(is_resource($proc)) {
		//stdin
		$stdin = serialize(array('time' => time()));
		fwrite($pipes[0], $stdin); //把参数传给脚本task.php
		fclose($pipes[0]); //fclose关闭管道后proc_close才能退出子进程,否则会发生死锁
		register_shutdown_function(function() use($pipes, $proc) { //事件驱动(脚本结束事件),异步回调
			//stdout
			$stdout = stream_get_contents($pipes[1]);
			fclose($pipes[1]);
			//stderr
			$stderr = stream_get_contents($pipes[2]);
			fclose($pipes[2]);
			//exit code (返回进程的终止状态码,如果发生错则返回-1)
			$status = proc_close($proc);
			$data = array(
				'stdout' => $stdout,
				'stderr' => $stderr,
				'status' => $status,
			);
			var_export($data); //echo json_encode($data);
		});
	}
}
foo();
//输出:
array (
  'stdout' => 'a:1:{s:4:"time";s:19:"2016-09-11 21:26:29";}',
  'stderr' => '',
  'status' => 0,
)

 

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