php filter_var 过滤指定数据
定义和用法
该filter_var ( )函数的过滤器与一个变量指定的过滤器。
返回过滤数据的成功或FALSE的失败。
语法
filter_var(variable, filter, options)
variable:必需。指定变量过滤 filter:可选。指定编号的过滤器来使用。默认是FILTER_SANITIZE_STRING 。
检查PHP的过滤器完全可能的参考过滤器 过滤器编号可以是一个编号名称(如FILTER_VALIDATE_EMAIL )或身份证号码(如274 ) options:可选。指定一个关联数组的旗帜/选项或一个单一的旗帜/选项。检查每个过滤器的各种可能的选择和旗帜
来看看filter_var实例教程
if(!filter_var("someone@example....com", FILTER_VALIDATE_EMAIL)) { echo("E-mail is not valid"); } else { echo("E-mail is valid"); } ?>
输出结果.
E-mail is not valid

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