quotemeta

(PHP 4, PHP 5)

quotemeta — Quote meta characters

说明

string quotemeta ( string $str )

Returns a version of str with a backslash character (\) before every character that is among these:

. \ + * ? [ ^ ] ( $ )

参数

str: The input string.

返回值

Returns the string with meta characters quoted, or FALSE if an empty string is given as str.

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
preg_match() - 执行一个正则表达式匹配
preg_quote() - 转义正则表达式字符

PHP手册 - N: Quote meta characters

用户评论:

kumarkulandai at gmail dot com (27-Oct-2009 07:29)

<?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 (17-Feb-2006 04:57)

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)

(15-May-2001 11:41)

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).