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escapeshellarg

Escape a string to be used as a shell argument (PHP 4 >= 4.0.3, PHP 5)
string escapeshellarg ( string arg )

escapeshellarg() adds single quotes around a string and quotes/escapes any existing single quotes allowing you to pass a string directly to a shell function and having it be treated as a single safe argument. This function should be used to escape individual arguments to shell functions coming from user input. The shell functions include exec(), system() and the backtick operator.

Parameters

arg

The argument that will be escaped.

Return Values

The escaped string.

Examples

Example 2010. escapeshellarg() example

<?php
system
('ls '.escapeshellarg($dir));
?>