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(PHP 4 >= 4.0.3, PHP 5)

escapeshellarg -- Escape a string to be used as a shell argument

Description

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 1. escapeshellarg() example

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

Related Function(s)

exec()

system()

escapeshellcmd()

popen()