PHP执行Linux命令函数

目前，PHP环境几乎都搭载在Linux环境，有时候，我们需要PHP去执行Linux命令实现一些特殊功能。介绍以下5个PHP执行Linux函数。

exec

返回结果如下

string exec ( string $command [, array &$output [, int &$return_var ]] )

// 琼台博客 www.qttc.net

echo exec("ls");

Array
(
[0] => index.html
[1] => 10.log
[2] => 10.tar.gz
[3] => aaa.tar.gz
[4] => mytest
[5] => test1101
[6] => test1102
)

system

string system ( string $command [, int &$return_var ] )

// 琼台博客 www.qttc.net

echo system("ls");

index.html
10.log
10.tar.gz
aaa.tar.gz
mytest
test1101
test1102

passthru

void passthru ( string $command [, int &$return_var ] )

// 琼台博客 www.qttc.net

$cmd = "ls";

passthru($cmd, $status);

if ($status == 0) {
  // success
} else {
  // failure
}

proc_open

resource proc_open ( string $cmd , array $descriptorspec , array &$pipes [, string $cwd [, array $env [, array $other_options ]]] )

// 琼台博客 www.qttc.net

$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

shell_exec

string shell_exec ( string $cmd )

index.html
10.log
10.tar.gz
aaa.tar.gz
mytest
test1101
test1102

以上为5个执行Linux命令的PHP函数。