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<?php $arr1 = ['o' => 'vote', 'u' => 'true']; $arr2 = ['p' => '', 'v' => 'digit']; $merged = array_merge($arr1, $arr2); usort($merged, function($v1, $v2){ if($v1 !== false && empty($v1)){ return 1; }elseif($v2 !== false && empty($v2)){ return -1; }else{ return 0; } }); echo '<pre>'; print_r($merged); ?>

This is an error 500

Value for `_results` contains invalid data `array`


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