使用preg_match函数的PHP错误 [英] PHP error using the preg_match function

问题描述

我正在使用PHP eregi函数，但我注意到它已被弃用。这是我的代码：

I'm was using PHP eregi function, but I get the notice that it is deprecated. Here's my code:

!eregi("^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$", trim($_POST['email']))

因此，我试图用preg_match替换该函数，但似乎无法为preg_match获取正确的模式，因为以下代码出错：

Therefore I am trying to replace the function with the preg_match, but seems that I am unable to get the correct pattern for the preg_match, as I get error with the following code:

!preg_match("^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$", trim($_POST['email']))

这是我从上面的代码中得到的错误：

Here's the error I get from above code:

Warning: preg_match(): No ending delimiter '^' found in

感谢您的帮助。

推荐答案

您需要在正则表达式的开头和结尾使用定界符，通常是 / ：

You need to use a delimiter at the beginning and end of your regex, commonly /:

!preg_match("/^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,4}$/", trim($_POST['email']))

手动输入： PCRE简介 / 定界符

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