Online PHP editor | output for idDmY

<?php $arr = array ( 1502290800 => '75', 1502294400 => '79', 1502298000 => '79', 1502301600 => '81', 1502305200 => '81', 1502308800 => '81', 1502312400 => '81', 1502316000 => '79', 1502319600 => '75', 1502323200 => '70', 1502326800 => '61', 1502330400 => '57', 1502334000 => '55', 1502337600 => '55', 1502341200 => '54', 1502344800 => '54', 1502348400 => '52', 1502352000 => '52', 1502355600 => '50', 1502359200 => '50', 1502362800 => '52', 1502366400 => '29', 1502370000 => '28', 1502373600 => '81', 1502377200 => '79', 1502380800 => '81', 1502384400 => '81', 1502388000 => '79', 1502391600 => '79', 1502395200 => '79', 1502398800 => '75', 1502402400 => '79', 1502406000 => '76', ); $filter = function ($value) { return $value < 32; }; print_r(array_filter($arr, $filter));