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php怎么检测email是否有效?

Jun 20, 2016 pm 01:04 PM
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php怎么检测email是否有效?

php检测email是否有效的方法:

PHP判断电子邮件email是否正确、是否有效,是我们PHP面试过程中常见考题之一。我们可以使用PHP过滤器来实现判断。

下面我们就通过具体示例,给大家介绍PHP判断电子邮箱是否正确的简单实现方法。

代码如下:

<?php
  
$email = "demo@example.com";
if (filter_var($email, FILTER_VALIDATE_EMAIL))
{
  echo &#39;"&#39; . $email . &#39;" 是有效的。&#39;;
}
else
{
  echo &#39;"&#39; . $email . &#39;" 是无效的。&#39;;
}
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我们使用FILTER_VALIDATE_EMAIL过滤器验证电子邮件地址,这里我们要判断demo@example.com这个邮件是否有效。

前台访问结果如下:

1.png

那么我们再随便输入一个值:rtgdrgdth555。

判断结果如下:

2.png

filter_var()函数使用指定的过滤器过滤变量。

filter_var()函数语法:

mixed filter_var(mixed $ variable [,int $ filter = FILTER_DEFAULT [,mixed $ options]])
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其中参数:

variable :要过滤的值。

filter:要应用的过滤器的ID。

options:一个选项的关联数组,或者按位区分的标示。

更多相关知识,请访问 PHP中文网!!

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