PHP验证邮箱函数

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正则表达式

function checkEmail($email)
{
$pregEmail = "/([a-z0-9]*[-_\.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-
 
9]+)+[\.][a-z]{2,3}([\.][a-z]{2})?/i";
return preg_match($pregEmail,$email);
}