Online PHP editor | output for vv1U3

@ 2015-12-31T00:02:32Z

<?php

$list_of_lists_of_lists = [[1, 2, [3]], [4, 3, 4, [5, 3, 4]], 3];
$flattened_list = [];

function flatten($l){
    foreach ($l as $value) {
        if (is_array($value)) {
            returnflatten($value);
        }else{
            $flattened_list[] = $value;
        }
    }
    return $flattened_list;
}

$flattened_list = flatten($list_of_lists_of_lists);
print_r($flattened_list);

Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Call to undefined function returnflatten() in /in/vv1U3:9 Stack trace: #0 /in/vv1U3(17): flatten(Array) #1 {main} thrown in /in/vv1U3 on line 9
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Fatal error: Call to undefined function returnflatten() in /in/vv1U3 on line 9
Process exited with code 255.

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