<?php 
$test = "ls /tmp/test"; //ls是linux下的查目錄，文件的命令
exec($test,$array); //執(zhí)行命令
print_r($array);
?>

[root@krlcgcms01 shell]# php ./exec.php 
Array 
( 
[0] => 1001.log 
[1] => 10.log 
[2] => 10.tar.gz 
[3] => aaa.tar.gz 
[4] => mytest 
[5] => test1101 
[6] => test1102 
[7] => weblog_2010_09 
)

<?php 
$test = "ls /tmp/test";
$last = system($test);
print "last: $last\n";
?>

[root@krlcgcms01 shell]# php system.php 
1001.log 
10.log 
10.tar.gz 
aaa.tar.gz 
mytest 
test1101 
test1102 
weblog_2010_09 
last:weblog_2010_09

<?php 
$test = "ls /tmp/test";
passthru($test);
?>

<?php 
$test = "ls /tmp/test";
$fp = popen($test,"r"); //popen打一個(gè)進(jìn)程通道

while (!feof($fp)) { //從通道里面取得東西
$out = fgets($fp, 4096);
echo $out; //打印出來(lái)
} 
pclose($fp);
?>

<?php 
$test = "ls /tmp/test";
$array = array(
array("pipe","r"), //標(biāo)準(zhǔn)輸入 
array("pipe","w"), //標(biāo)準(zhǔn)輸出內(nèi)容 
array("pipe","w") //標(biāo)準(zhǔn)輸出錯(cuò)誤 
); 
$fp = proc_open($test,$array,$pipes); //打開一個(gè)進(jìn)程通道
echo stream_get_contents($pipes[1]); //為什么是$pipes[1]，因?yàn)?是輸出內(nèi)容
proc_close($fp);
?>

<?php 
$test = "ls /tmp/test";
$out = shell_exec($test);
echo $out;
?>

[root@krlcgcms01 shell]# php test.php 
1001.log 
10.log 
10.tar.gz 
aaa.tar.gz 
mytest 
test1101 
test1102 
weblog_2010_09