How to fix error with array?

Question

PHP

The code

$mozg = preg_split("-[\W]-u", "1 2 3 4");
$go = $ilya = [];

for ($ali = 0; $ali <= count($mozg); $ali++) {
    for ($bobi = 0; $bobi < $ali; $bobi++) {
        $coomo = array(implode(' ', array_slice($mozg, $bobi, count($mozg) - $ali + 1)));

        if (!isset($ilya[$coomo])) {
            $ilya[$coomo] = array_push($go, $coomo);
        }
    }
}

print_r($go);

error appears in this function

if (!isset($ilya[$coomo])) {
            $ilya[$coomo] = array_push($go, $coomo);
        }

Answer 1

Because you are using an array as a key:

$coomo = [1,2,3];
$ilya = [];
$ilya[$coomo]  = 1; // this raised error

Answer 2

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