PHP to do page landing page, transfer data, invalid variables, solve

PHP Login Interface Problem

PHP set a total of three variables, the decision found only $select valid, the other two invalid, what is the matter?
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Login Interface Code:



<title>Untitled Document</title>

Southwest University of Nationalities Experimental Teaching Management System User Login

PHP Detection code:

@ $textfield =$_post[' TextField ');
@ $textfield 2=$_post[' textfield2 ');
@ $select =$_post[' select '];
if ($textfield = = "a") && ($textfield 2== "123") && ($select = = "B")//Input a,123, select the teacher is invalid, remove any
echo "

Fffffff

"; Conditions, enter arbitrary data, find ($select = = "B") is valid,
else//Other two statements are useless and must be false.
Header ("location:http://localhost/phpmyadmin/documentation.html");
Exit
?>

Reply to discussion (solution)

How many form!!! are you going to write?

How many form!!! are you going to write?
Don't understand?

A form will be OK, keep the first form, and the rest will be erased.

That's it

 
  
 <title>Untitled Document</title>
 
 
  
 
  
  
 
   
 
    
 
     
 
      
 
       
 
        
 
        
Southwest University of Nationalities
 
       
 
      
 
     
 
     
 
      
 
       
 
        
Experimental Teaching Management System
 
       
 
      
 
     
 
     
 
      
 
       
 
        
 
        
User Login
 
       
 
       
 
        
 
       
 
      
 
     
 
 
   
 
  

 
 

You're going to reverse the sky, a text box a form, you can directly put the form in the table outside, you only need a form.

