escapeshellcmd() escapes any characters in a
string that might be used to trick a shell command into executing
arbitrary commands. This function should be used to make sure
that any data coming from user input is escaped before this data
is passed to the exec() or
system() functions, or to the backtick
The command that will be escaped.
The escaped string.
Example 1. escapeshellcmd() example
<?php $e = escapeshellcmd($userinput);
// here we don't care if $e has spaces system("echo $e"); $f = escapeshellcmd($filename);
// and here we do, so we use quotes system("touch \"/tmp/$f\"; ls -l \"/tmp/$f\""); ?>