Laravel "undefined array key 0" that is actually defined - php

Question

This is really weird. Laravel is telling me "undefined array key 0" but I am able to echo the value that Laravel can't seem to see and I can assign it to a variable.
$progress_check = db::select("select submitted, signed_off from users_to_stages where user_id = ? and sop_id = ? and stage_id = ?", [Auth::user()->id, $id, $do_stage_object->id]);
$thing = $progress_check[0]->submitted; // <-- $progress_check[0]->submitted contains 1
echo $thing;
exit;
And I get 1 returned from $thing. No errors. But! This:
$progress_check = db::select("select submitted, signed_off from users_to_stages where user_id = ? and sop_id = ? and stage_id = ?", [Auth::user()->id, $id, $do_stage_object->id]);
$thing = $progress_check[0]->submitted;
if($thing) {
$do_stages[$do_stage_object->id]['submitted'] = 1;
} else {
$do_stages[$do_stage_object->id]['submitted'] = 0;
}
Gives "Undefined array key 0" on the $thing = ... line that previously threw no error and successfully outputted the value (of 1).
If it helps, here's the print_r and dd of $progress_check:
print_r($progress_check);
Array
(
[0] => stdClass Object
(
[submitted] => 1
[signed_off] => 0
)
)
dd($progress_check);
array:1 [▼
0 => {#644 ▼
+"submitted": "1"
+"signed_off": "0"
}
]
I'm no expert on Laravel or object-oriented PHP (or object-oriented anything else for that matter) so maybe I'm just missing something I should know? Another pair of eyes was equally stumped though so... more eyes please!
I should mention, I'm running Laravel 8.83.22.
Edit: using db::table instead in line with ItsGageH's answer gives the same error and same situation with still being able to echo / assign it (as long as I don't then use if in an if) but slightly different contents in the DB results:
print_r($progress_check);
Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[submitted] => 1
[signed_off] => 0
)
)
[escapeWhenCastingToString:protected] =>
)
Edit: bonus points (imaginary points though) if anyone can tell me what that 644 is?

Answer 1

You need to specify the table first, before the Select statement, then use where and get
So, you'd be looking at doing:
DB::table('users_to_stages')
->select('submitted, signed_off')
->where('user_id', '=', Auth::user()->id)
->where('sop_id', '=', $id)
->where('stage_id', '=', $do_stage_object->id)
->get();
Further Laravel select-statement reference here

Answer 2

The answer "Undefined array key 0" means you haven't define any first element with the 0 key. For instance: [0 => Auth::user()->id]
It seems you can workaround the problem without the [0] at $progress_check:
$progress_check = db::select("select submitted, signed_off from users_to_stages where user_id = ? and sop_id = ? and stage_id = ?", [Auth::user()->id, $id, $do_stage_object->id]);
$thing = $progress_check->submitted;
if($thing) {
$do_stages[$do_stage_object->id]['submitted'] = 1;
} else {
$do_stages[$do_stage_object->id]['submitted'] = 0;
}
Your bonus point:
644 is about the permission of reading or writing files, depending of what have been set up with chmod. This choice is often chosen, don't care about it.