Laravel "Use of undefined constant forum - assumed 'forum'" error

Question

web.php

Route::get('/index/{forum}/{php}/{framework}/questions', function($forum, $php, $framework){
    return view('questions')->with('forum', $forum)->with('php', $php)->with('framework', 
$framework);
});

questions.blade.php

1. = {{forum}} / 2. = {{php}} / 3. = {{framework}}

I'm trying this but i get this error.

Please ALWAYS show us ALL the erro rmessage and not a summary. Error messages normally come with line numbers and filename of where an error occurs — RiggsFolly, Oct 09 '19 at 15:57

Salim Djerbouh · Answer 1 · 2019-10-09T15:59:45.830

3

Blade curly braces are basically PHP echo function, so act accordingly

1. = {{ $forum }} / 2. = {{ $php }} / 3. = {{ $framework }}

Calling a variable without the $ dollar sign is reserved for constants and you haven't defined such constants

Here's what happens in the background of this Blade line

1. = <?php echo e(forum); ?> / 2. = <?php echo e(php); ?> / 3. = <?php echo e(framework); ?>

<?php /**PATH resources/views/welcome.blade.php ENDPATH**/ ?>

You can see that forum, php and framework are called as constants here, while you want to output variables

1. = <?php echo e($forum); ?> / 2. = <?php echo e($php); ?> / 3. = <?php echo e($framework); ?>

<?php /**PATH resources/views/welcome.blade.php ENDPATH**/ ?>

Hope this helps

edited Oct 09 '19 at 15:59

answered Oct 09 '19 at 15:51

Salim Djerbouh

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'*You can see that forum, php and framework are constants here*' - Slight point here, they're *not* constants rather the interpreter assumes them to be constants (as it can't be anything else) thus causing the '*undefined constant [...]*'. – Script47 Oct 09 '19 at 15:56
Called as constants? – Salim Djerbouh Oct 09 '19 at 15:57
1

Yes, they're called as constants, that makes more sense. – Script47 Oct 09 '19 at 15:58
Oh thank you for help – C. Aydın Oct 09 '19 at 16:05

Laravel "Use of undefined constant forum - assumed 'forum'" error

1 Answers1