escapeshellarg Escape a string to be used as a shell argument


escapeshellarg

(PHP 4 >= 4.0.3, PHP 5)

escapeshellargEscape a string to be used as a shell argument

说明

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.

参数

arg

The argument that will be escaped.

返回值

The escaped string.

范例

Example #1 escapeshellarg() example

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

参见


«  error_reporting
» escapeshellcmd
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