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(PHP 4, PHP 5)
quotemeta — 转义元字符集
$str
)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:
str
输入字符串
返回 元字符集被转义后的 字符串,如果输入字符串str
为空,
则返回 FALSE
。
Note: 此函数可安全用于二进制对象。
[#1] kumarkulandai at gmail dot com [2009-10-26 23:29:02]
<?php
$str = "Hello world. (can you hear me?)";
echo quotemeta($str);
?>
The output of the code above will be:
Hello world\. \(can you hear me\?\)
[#2] George Adams [2006-02-16 20:57:25]
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)
[#3] [2001-05-15 15:41:08]
This function escapes characters that have special meaning in regular expressions. preg_quote() <http://php.net/manual/en/function.preg-quote.php> has similar functionality, but is more powerful since it escapes more characters (including one user-specified character).