Use of undefined constant logged - assumed 'logged'

Question

Having an issue with my code, it's strange because the exact same code works in another .php file but not in this one for whatever reason. I get the error:

Notice: Use of undefined constant logged - assumed 'logged' in ... on line 54

The code below is where the error is said to be. At the IF statement. The second piece of code in tags is the function. It's stored in a separate file 'functions.php'.

<?php
    include 'functions.php';
    $logged = @logged_in($_SESSION['uuid']);
      
    if(logged==true){
        echo 'logged in';
    }
?>

<?php

function logged_in($uuid){
    $servername="localhost";          
    $dbusername="root";                 
    $dbpassword="usbw";                    
    $database="randomfacts";           
    $link=mysql_connect($servername,$dbusername,$dbpassword);
    if(! $link){
        die('Connection Failed'.mysql_error());
    }
    mysql_select_db($database,$link);
      
    $query = "SELECT * FROM users WHERE uuid='$uuid'";
    $rows = mysql_query($query) or die(mysql_error());
    $count = mysql_num_rows($rows);
      
    if($count==0){ 
        return false;
    }else{
        return true;
    }
  
    mysql_close($link);  
}

?>

`if(logged==true)` should be `if($logged==true)` (you're missing the `$`) — M. Eriksson, Sep 23 '17 at 21:23

score 1 · Accepted Answer · answered Sep 23 '17 at 21:23

1

change

if(logged==true)

to

if($logged==true)

answered Sep 23 '17 at 21:23

Axel

3,331
11
35
58

Can't believe I didn't notice that! It's so obvious. Thank you!! – Luke Holland Sep 23 '17 at 21:24
You are very welcome :) – Axel Sep 23 '17 at 21:26
I am going to it's just I have to wait, sorry. – Luke Holland Sep 23 '17 at 21:32

score 1 · Answer 2 · answered Sep 23 '17 at 21:24

1

$logged is a variable. You're missing the dollar sign ($) in the expression that issues the warning, so PHP parses logged as the name of a constant, but, of course, no constant is defined with that name.

answered Sep 23 '17 at 21:24

mr_carrera

76
6

Thank you, really obvious mistake can't believe I missed it. – Luke Holland Sep 23 '17 at 21:25
It happens to the best of us! – mr_carrera Sep 23 '17 at 21:25

Use of undefined constant logged - assumed 'logged'

2 Answers2