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PHP data validation library

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PHP data validation library

This is a form data validation class implemented through a piece of PHP code. It is a very easy-to-use and convenient form data validation class

<?php
//验证类
class Fun{
     
  function isEmpty($val)
  {
    if (!is_string($val)) return false; //是否是字符串类型   
    if (empty($val)) return false; //是否已设定   
    if ($val=='') return false; //是否为空
    return true;       
  }

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