dedecms custom forms settings required

First, we have to use some php code to determine the verification code is mandatory

1. Locate the file plus, and then in line 40 plus / diy.php file plus the following code:

//增加必填字段判断
if($required!=''){
if(preg_match('/,/', $required))
{
$requireds = explode(',',$required);
foreach($requireds as $field){
if($$field==''){
showMsg('带*号的为必填内容，请正确填写', '-1');
exit();
}
}
}else{
if($required==''){
showMsg('带*号的为必填内容，请正确填写', '-1');
exit();
}
}
}
//end

We add the following code in a custom form of dedecms template:

<input type="hidden" name="required" value="content,name,tel" />