The difference between the EXEC function and the shell_exec function in PHP, execshell_exec_php tutorial

The difference between the EXEC function and the shell_exec function in PHP, execshell_exec

Both functions execute the Linux command function, except that the return result is not the same, exec can only get the last row of data, and SHELL_EXECU can get all the data.

If the script path has the following file:
Copy the Code code as follows:
-bash-4.1# LL
Total Dosage 12
-rw-rw-r--. 1 www web 133 July 15:00 a.php
-rw-r--r--. 1 Lee Web 59 February 17:05 b.php
-rw-r--r--. 1 Lee Web 81 March 8 17:00 c.php

exec Example
Copy the Code code as follows:
<?php
/**
* The difference between exec and shell_exec
* Jones Taiwan Blog
*/
$data = EXEC ('/bin/ls-l ');
Echo '

';
Print_r ($data);
Echo '

';
?>

Execution results
Copy CodeThe code is as follows:
-rw-r--r--. 1 Lee Web Bayi Mar 8 17:00 c.php

shell_exec Example
Copy CodeThe code is as follows:
<?php
/**
* The difference between exec and shell_exec
* Jones Taiwan Blog
*/
$data = shell_exec ('/bin/ls-l ');
Echo '

';
Print_r ($data);
Echo '

';
?>

Execution results
Copy CodeThe code is as follows:
Total 12
-rw-rw-r--. 1 www web 139 Jul a.php
-rw-r--r--. 1 Lee Web 17:05 b.php
-rw-r--r--. 1 Lee Web Bayi Mar 8 17:00 c.php

So the children's shoes usually use the EXEC function notice, if you need to get all the return information, you should use the Shell_exec function, of course, if the command execution results only one row return information, then it doesn't matter what to use.

PHP performs shell_exec functions in Linux

Shell_exec ("/usr/local/bin/pdf2swf/home/xiazai/03.pdf-o/home/xiazai/1.swf; /usr/local/bin/jpeg2swf/home/xiazai/2.jpg-o/home/xiazai/2.swf ");
Add a semicolon after each command

Phpini Open EXEC function how to open

The first thing to do is to turn off safe mode Safe_mode = Off

And then look at the list of disabled functions
Disable_functions = Proc_open, Popen, exec, System, shell_exec, PassThru

We're going to remove exec here.
Reboot Apache is OK.

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