url - cleaning untrusted inputs that build os commands in PHP? -


how remove untrusted inputs build os commands url in php?

when running automatic testing zaproxy, getting alert of p1 inputs building os commands. want know how clean commands.

use escapeshellarg() , escapeshellcmd() escape data usage shell command or argument.

// escapes single argument // sample input: "/foo/bar/" $argument = escapeshellarg($userinput1);  exec("ls $argument");  // escapes special characters [];{} usage in command line // sample input: "ls -l; rm -rf /" $command = escapeshellcmd($userinput2); exec($command);

you should use both commands prevent users executing arbitrary commans on server.

documentation:

http://php.net/manual/en/function.escapeshellarg.php http://php.net/manual/en/function.escapeshellcmd.php


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