quotemeta

(PHP 4, PHP 5, PHP 7, PHP 8)

quotemeta转义元字符集

说明

quotemeta ( string $string ) : string

返回 在下面这些特殊字符前加 反斜线(\) 转义后的字符串。 这些特殊字符包含:

. \ + * ? [ ^ ] ( $ )

参数

string

输入字符串

返回值

返回 元字符集被转义后的 字符串,如果输入字符串string为空, 则返回 false

注释

Note: 此函数可安全用于二进制对象。

参见

User Contributed Notes

kumarkulandai at gmail dot com 26-Oct-2009 11:29
<?php
$str
= "Hello world. (can you hear me?)";
echo
quotemeta($str);
?>

The output of the code above will be:
Hello world\. \(can you hear me\?\)
George Adams 16-Feb-2006 08:57
Took me a while to realize this was NOT the command I wanted for escaping potentially harmful characters in a string that would be used as part of a system command.  Instead, I needed either escapeshellarg() (http://www.php.net/manual/en/function.escapeshellarg.php) or escapeshellcmd() (http://www.php.net/manual/en/function.escapeshellcmd.php)