为什么不更简单
$ts_by_url = array();
foreach($array as $data) {
$ts_by_url[ $data['url_id'] ] += $data['time_spent'];
}
php使用多维数组按SUM分组
为什么不更简单
$ts_by_url = array();
foreach($array as $data) {
$ts_by_url[ $data['url_id'] ] += $data['time_spent'];
}