<?php error_reporting(E_ALL); $arr = [["url_id" => 2191238, "time_spent" => 41], ["url_id" => 2191606, "time_spent" => 215], ["url_id" => 2191606, "time_spent" => 25] ]; $its_by_url = []; foreach($arr as $data) { if ( !isset( $its_by_url[ $data["url_id"] ] ) ) { $its_by_url[ $data["url_id"] ] = 0; } $its_by_url[ $data["url_id"] ] += $data["time_spent"]; } print_r($its_by_url);
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