如何获取proc_open()的输出 [英] how to get output of proc_open()
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问题描述
我试图从php中的proc_open
方法获取输出,但是,当我打印它时,我却空了.
I've tried to get output from proc_open
method in php, but, when I print it, I got empty.
$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("file", "files/temp/error-output.txt", "a")
);
$process = proc_open("time ./a a.out", $descriptorspec, $pipes, $cwd);
只要我知道,我就可以用stream_get_contents()
as long as I know, I can get the output with stream_get_contents()
echo stream_get_contents($pipes[1]);
fclose($pipes[1]);
但是我不能那样做. 有什么建议吗?
But I can't do that.. any suggestion?
谢谢...
推荐答案
您的代码或多或少对我有用. time
将其输出打印到stderr
,因此,如果要查找该输出,请查看文件files/temp/error-output.txt
. stdout
管道$pipes[1]
将仅包含程序./a
的输出.
Your code more or less works for me. time
prints its output to stderr
so if you're looking for that output, look in your file files/temp/error-output.txt
. The stdout
pipe $pipes[1]
will only contain the output of the program ./a
.
我的复制人:
[edan@edan tmp]$ cat proc.php
<?php
$cwd='/tmp';
$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("file", "/tmp/error-output.txt", "a") );
$process = proc_open("time ./a a.out", $descriptorspec, $pipes, $cwd);
echo stream_get_contents($pipes[1]);
fclose($pipes[1]);
?>
[edan@edan tmp]$ php proc.php
a.out here.
[edan@edan tmp]$ cat /tmp/error-output.txt
real 0m0.001s
user 0m0.000s
sys 0m0.002s
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