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HomeBackend DevelopmentPHP Tutorial验证用户注册信息是否合法_PHP

关键函数

通过JavaScript对用户注册信息的合法性进行验证时,经常需要对数值型数据进行检验。

JavaScript可以应用isNaN()函数实现上述功能,下面对该函数进行讲解。

isNaN()函数

用于判断该函数的参数是否为数值型数据,是返回False,否则返回True。

语法

bool isNaN(var)

参数var为要进行判断的数据。

功能实现

用户填写完注册信息后,为了保证这些信息的合法性,还应该对这些信息进行验证。对注册信息的合法性进行验证既可以应用PHP代码实现,也可以应用JavaScript实现。开发人员可以根据实际情况进行选取,如果担心客户端浏览器对JavaScript进行了限制,则可以采用PHP代码实现,但使用这种方法对注册信息进行验证是在服务器中进行的,所以会浪费大量的服务器资源。而应用JavaScript脚本对用户的注册信息进行验证,是客户端浏览器实现的,所以会在很大程度上节省服务器资源。本站对用户注册信息的验证通过JavaScript实现。在编写用户注册信息验证模块时,将实现用户注册信息验证的代码封装到自定义函数chkinput login()中,并在表单《form》标记的onSubmit事件中对该函数进行调用,Chkinput login()函数的代码如下。

以下为

以下为include_once("top.php");
?>


 

   

     
       
   
   
 

               include_once("left.php");
    ?>
   
 
     
       
     
   
验证用户注册信息是否合法_PHP

     
       
         
       
     
 

     
      
      


    

  


         

         

       

       

         

         

       

       

         

         

       

       

         

         

       

       

         

         

       

       

         

         

       

       

         

         

       

       

         

         

       

       

         

         

         

       

       

         

         

       

       

         

       

  
   

用户昵称:

           
             
             
           
         
 
密  码:
 
确认密码:
 
真实姓名:
 
性  别:
          
E-mail:
 
联系电话:
 
QQ号码:
 
头像选择:
   验证用户注册信息是否合法_PHP
联系地址:www.zw361.com 
 
  

include_once("bottom.php");
?>

验证用户注册信息是否合法的运行结果如下图所示。

图验证用户的注册信息是否合法的运行结果

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