纠结一个简单的if格式问题
就像表单验证那样 有些语句总要写狠多if 判断用户名、邮箱、密码等。
用js验证时写一个函数
function check(){
if(用户名!=''){
if(邮箱!=''){
if(密码!=''){
return true;
}
}
}
return false;
}
觉得层数太多不好看;特别是if为真里面的代码多的时候;甚至一个if里的内容超过了一页的范围。
于是改成了这样。
function check(){
if(用户名!=''){
return false;
}
if(邮箱!=''){
return false;
}
if(密码!=''){
return false;
}
return true;
}
这样看起来清晰,特别是if多的时候。只是有多少个判断就要写 return false多次。
大神们给给宝贵的意见阿 先谢谢啦。
------解决方案--------------------
function check(){<br />$error = 0;<br /> if(用户名==''){<br /> $error=1;<br /> }<br /> if(邮箱==''){<br /> $error=2;<br /> }<br /> if(密码==''){<br /> $error=3;<br /> }<br /> return $error;<br />}
那就只能这样了,返回一个错误代码来帮助判断
------解决方案--------------------
可以把你验证的东西都写成类方法,然后使用链式语法来检验:
class check_rule{<br /> <br /> public function check_nickname($name){<br /> <br /> if(true){<br /> return $this;<br /> }<br /> <br /> die('用户名不符合规则');<br /> }<br /> <br /> public function check_email($email){<br /> <br /> if(true){<br /> return $this;<br /> }<br /> <br /> die('email不符合规则');<br /> }<br /> <br /> public function check_password($password){<br /> <br /> if(true){<br /> return $this;<br /> }<br /> <br /> die('密码不正确');<br /> }<br />}<br /><br />$check = new check_rule();<br /><br />$check->check_nickname($name)<br /> ->check_email($email)<br /> ->check_password($password);

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