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Simple PHP Login System: Registration Error ( Notice: Only variables should be passed by reference )


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I had a difficult time solving this bug, and finally solved it.  I'm posting it here to help others who might be struggling with the same situation. 

Code Source:

This code is from the Simple PHP Login System, Lesson 17 & 18.  

My Setup:

  • Machine: Windows 10
  • WAMP
  • PHP version: 7.4.9
  • Code Editor: VS Code

Here is my error notice:

Notice: Only variables should be passed by reference in C:\wamp64\www\phplogin-parts17-18-projectfiles\register.php on line 144

I got that error message when I tried to register a member.

The problem lies in LINE 144



 You need to create a new variable that represents...
      md5($input['pass'. $config['salt'])
 Let's call that variable $salty....
      $salty = md5($input['pass'. $config['salt']);
...and then insert that new variable $salty into ... $stmt->bind_param(x, x, x, x, $salty);
The code should look like this:
     if ($stmt = $mysqli->prepare("INSERT members (username, email, typepasswordVALUES (?,?,?,?)"))
         $salty = md5($input['pass'. $config['salt']);
         $stmt->bind_param("ssss"$input['user'], $input['email'], $input['type'], $salty);


Hope that helps!


Edited by StephenMBassett
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