PHP: Undefined index

Question

I have probably made a very simple mistake with this, but I do not see how.. If any of you could help me, I would appreciate it lots.

This is my error:
Notice: Undefined index: admin in C:\xampp\htdocs\forums\classes\User.php on line 75

Here is User.php

public function hasPermission($key) {
    $group = $this->_db->get('groups', array('id', '=', $this->data()->group));

    if ($group->count()) {
        $permissions = json_decode($group->first()->permissions, true);

        if ($permissions[$key] == true) { <<< This is line 75 <<<
            return true;
        }
    }
    return false;
}

Here is where I use hasPermission()

if($user->hasPermission("admin")){
    echo "You are an administrator";
}

var_dump($key);:

string(5) "admin"

var_dump($permissions);

array(1) { ["admin"]=> int(1) }

var_dump($permissions[$key]); outputs:

NULL

`var_dump($key);` before `if ($permissions[$key] == true)` and see what it outputs. — Amal Murali, Dec 31 '13 at 12:30
Could you try `if ((bool)$permissions[$key] == true)` if it suits your needs? — ASertacAkkaya, Dec 31 '13 at 12:39
Can you check if(array_key_exists($key,$permissions)){ echo "exists" ;} else { echo "not exists" ;} inside the function ? — Abhik Chakraborty, Dec 31 '13 at 12:43
Meaning the returned data from DB might be having a white space. You may use trim() to remove that. You can additionally check if(array_key_exists("admin",$permissions)){ echo "exists" ;} else { echo "not exists" ;} If the above returns exists then DB returned data is ok, you need to trim() the $key, else you need to trim() the DB returned Data — Abhik Chakraborty, Dec 31 '13 at 12:46
What does your `json_decode($group->first()->permissions, true);` function and what is it's full expected return? — ASertacAkkaya, Dec 31 '13 at 12:47
@AbhikChakraborty If an empty space were to return, wouldn't that dump into string(1) " " though? OP's `$permissions` output was `int(1)` inside `["admin"]`. Meanwhile however, that didn't still explain how did the key output `NULL` instead, or am I the one missing something? — ASertacAkkaya, Dec 31 '13 at 12:51

score 1 · Accepted Answer · answered Dec 31 '13 at 12:45

1

Try to use this one:

if (isset($permissions[$key]) && $permissions[$key] == 1) {
   return true;
} else {
   return false;
}

answered Dec 31 '13 at 12:45

Code Lღver

15,434
16
54
74

Thanks very much, this solved the problem. – Kondax Design Dec 31 '13 at 12:47
If there's a bug, you should fix it, not hide it. Working around using `isset()` might work now, but just keep in mind that hidden bugs often come back to bite you. – Amal Murali Dec 31 '13 at 13:01

PHP: Undefined index

1 Answers1