Under normal circumstances, php is rarely used to execute linux commands, but under special circumstances, you may use it these functions. I used to know that there are two functions that can execute linux commands, one is exec and the other is shell_exec. In fact, there are many. Based on the content of the manual, the following 6 functions are introduced.
1, exec function
<?php $test = "ls /tmp/test"; //ls是linux下的查目录,文件的命令 exec($test,$array); //执行命令 print_r($array); ?>
The returned results are as follows:
[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 )
2, system function
<?php $test = "ls /tmp/test"; $last = system($test); print "last: $last\n"; ?>
Return results:
[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
3, passthru function
<?php $test = "ls /tmp/test"; passthru($test); ?>
4, popen function
<?php $test = "ls /tmp/test"; $fp = popen($test,"r"); //popen打一个进程通道 while (!feof($fp)) { //从通道里面取得东西 $out = fgets($fp, 4096); echo $out; //打印出来 } pclose($fp); ?>
5, proc_open function
<?php $test = "ls /tmp/test"; $array = array( array("pipe","r"), //标准输入 array("pipe","w"), //标准输出内容 array("pipe","w") //标准输出错误 ); $fp = proc_open($test,$array,$pipes); //打开一个进程通道 echo stream_get_contents($pipes[1]); //为什么是$pipes[1],因为1是输出内容 proc_close($fp); ?>
6, shell_exec function
<?php $test = "ls /tmp/test"; $out = shell_exec($test); echo $out; ?>
The return results of popen, passthru, proc_open, shell_exec are as follows:
[root@krlcgcms01 shell]# php test.php 1001.log 10.log 10.tar.gz aaa.tar.gz mytest test1101 test1102 weblog_2010_09
These are the only functions I can find that can execute commands under Linux. I think there should be more. Welcome to add.