quotemeta
(PHP 4, PHP 5)
quotemeta — 转义元字符集
说明
$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：
参数
-
str -
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str为空，
则返回 FALSE 。
注释
Note: 此函数可安全用于二进制对象。
参见
- addslashes() - 使用反斜线引用字符串
- addcslashes() - 以 C 语言风格使用反斜线转义字符串中的字符
- htmlentities() - Convert all applicable characters to HTML entities
- htmlspecialchars() - Convert special characters to HTML entities
- nl2br() - 在字符串所有新行之前插入 HTML 换行标记
- stripslashes() - 反引用一个引用字符串
- stripcslashes() - 反引用一个使用 addcslashes 转义的字符串
- ereg() - 正则表达式匹配
- preg_quote() - 转义正则表达式字符
用户评论:
[#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).