(PHP 4, PHP 5)
quotemeta — Quote meta characters
$str
)Returns a version of str with a backslash character (\) before every character that is among these:
str
The input string.
Returns the string with meta characters quoted, or FALSE if an empty
string is given as str.
Note: 此函数可安全用于二进制对象。
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\. \(can you hear me\?\)
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)
(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).