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PHP 不要正则验证邮件大神何在

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Jun 13, 2016 pm 12:15 PM

emailnbspprotectedstrlen

PHP 不用正则验证邮件大神何在
条件1:第一个字符必须是英文或数字或下划线用哪个字符串函数?
条件2:必须包含一个@ 字符串函数是?
条件3:包含一个以上 . 符
条件4:@符在.符前
条件5:[email protected]
条件6:长度不能长于30 这个知道用mb_strlen
------解决思路----------------------

引用:

很想了解下，这样的应用场景，还有什么比正则更加合适呢？

逐字符分析其实很简单，正则表达式看似简洁但是效率很低

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