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 '"' . $email . '" 是有效的。'; } else { echo '"' . $email . '" 是无效的。'; }
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:
那么我们再随便输入一个值:rtgdrgdth555。
判断结果如下:
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]])
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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