Who can help me see where the code is wrong?

This is the if statement {code...} in the template under the thinkphp framework. This is the if statement in the template under the thinkphp framework.

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This is the if statement in the template under the thinkphp framework.

Missing In your code ! No

The format is correct. The following is the code on the official website.$v['id']Is there a value?

  
   value1
    value2
  

        public function test(){            $data['id']=2;            $this->assign("data",$data);            $this->display();        }

  
   1        
    2    
  

Case Study

For tp framework template syntax errors, you can find the errors in the PHP file in the corresponding module of the Runtime/Cache folder according to the error prompt. This syntax should be fine.

We recommend that you directly output the value $ v ['id'] % 2 first. Since no error is reported. It is not a syntax error.

What you want to achieve is even-number item color or other styles. You don't have to deal with this. css3 has a selector that can do this.