Online PHP editor | refs for dp6tt

<?php $array1 = [ (object) ["email" => "gffggfg"], (object) ["email" => "wefwef@test.it"], (object) ["email" => "wefewf"], ]; $array2 = [ (object) ["email" => "gffggfg@test.it"], (object) ["email" => "wefwef"], (object) ["email" => "wefewf"], ]; function concatArrays($arrays){ $buf = []; foreach($arrays as $arr){ foreach($arr as $v){ $buf[$v] = true; } } return array_keys($buf); } var_export( concatArrays([$array1, $array2]) );