php程序中验证邮箱,IP地址或url一般大家都会使用正则表达式来处理,其实在php里面有一些内置的专门验证规则,下面用实例说说如何使用php内置filter函数来验证email,ip以及URL.
PHP:指示支持该函数的最早的 PHP 版本.
函数 描述 PHP
filter_has_var() 检查是否存在指定输入类型的变量。 5
filter_id() 返回指定过滤器的 ID 号。 5
filter_input() 从脚本外部获取输入,并进行过滤。 5
filter_input_array() 从脚本外部获取多项输入,并进行过滤。 5
filter_list() 返回包含所有得到支持的过滤器的一个数组。 5
filter_var_array() 获取多项变量,并进行过滤。 5
filter_var() 获取一个变量,并进行过滤。 5
1、验证邮箱,代码如下:
- $email='111cn@163.com';
- $result=filter_var($email,FILTER_VALIDATE_EMAIL);
- var_dump($result);
- //输出:string(17) '111cn@163.com'
2、验证url地址,代码如下:
- $url='http://www.phpfensi.com/';
- $result=filter_var($url,FILTER_VALIDATE_URL);
- var_dump($result);
- //输出:string(25) 'http://www.phpfensi.com/'
3、验证ip地址,代码如下:
- $url='192.168.0.1';
- $result=filter_var($url,FILTER_VALIDATE_IP);
- var_dump($result);
- //输出:string(11) '192.168.0.1'
php中的filter函数还可用来验证浮点数,整形数字,布尔类型等等,具体可查阅php手册的filter函数.
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波比源码 » php中filter函数用法之验证邮箱、url和ip地址的方法
波比源码 » php中filter函数用法之验证邮箱、url和ip地址的方法
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