删除PHP中的特殊字符

本文介绍了删除PHP中的特殊字符的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有很多带有特殊字符的描述，例如é，ô等等，并尝试使用以下字符将其删除:

I have many descriptions with special characters like é, ô and many more and have tried to remove them with:

$string = str_replace("é", " ", $string)
$string = ereg_replace("é", " ", $string)
$string = mysql_real_escape_string($string)

但是没有任何效果，特殊字符仍然存在，并且描述未插入数据库中.我无法删除所有特殊字符，因为在说明中有需要的html标记.

But nothing works, the special characters are still there and the description is not inserted in the database. I can't remove all special characters because in the description there are html tags that are needed.

谢谢您的帮助！

推荐答案

简单易用:

function clean($string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
   return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
}

用法:

echo clean('a|"bc!@£de^&$f g');

将输出:abcdef-g

修改:

Hey, just a quick question, how can I prevent multiple hyphens from being next to each other? and have them replaced with just 1? Thanks in advance!

function clean($string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
   $string = preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.

   return preg_replace('/-+/', '-', $string); // Replaces multiple hyphens with single one.
}

请参阅此链接

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