<?php $array = [ ['key' => 1], ['key' => 2], ['key' => 3], ['key' => 1], ['key' => 2], ['key' => 3], ['key' => 4], ['key' => 5], ['key' => 6] ]; var_export(array_values(array_column($array, 'key', 'key')));
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Value for `_results` contains invalid data `array`