现有测试数据如下,要求实现如下图中的效果:
- array(4) {
- [0] =>array(6) {
- ["visit_id"] => int(127)
- ["goods_id"] => int(16)
- ["visittime"] => int(1494399935)
- ["goods_name"] => string(53)"OPPO R9s 全网通4G+64G 双卡双待手机 玫瑰金"
- ["shop_price"] => string(6)"500.00"
- }
- [1] =>array(6) {
- ["visit_id"] => int(124)
- ["goods_id"] => int(13)
- ["visittime"] => int(1494399921)
- ["goods_name"] => string(76)"SIEMENS/西门子 KA92NV09TI双开门家用对开门电冰箱变频旗舰款"
- ["shop_price"] => string(7)"4000.00"
- }
- [2] =>array(6) {
- ["visit_id"] => int(123)
- ["goods_id"] => int(27)
- ["visittime"] => int(1494399903)
- ["goods_name"] => string(85)"爱他美白金版Aptamil 幼儿配方奶粉3段(12-36个月适用)900g(欧洲进口)"
- ["shop_price"] => string(6)"329.00"
- }
- [3] =>array(6) {
- ["visit_id"] => int(120)
- ["goods_id"] => int(26)
- ["visittime"] => int(1494224263)
- ["goods_name"] => string(21)"欢乐谷免票一张"
- ["shop_price"] => string(5)"50.00"
- }
- }
还没实现之前我想这个代码不知道要O(n)呢还是更高的复杂度才能实现,细想一下,其实php的数组底层就是哈希实现的,如何简单利用这个特性使复杂度降到O(1)呢?
- show me the code:
- /* 浏览记录按日期分组 */
- functiongroupVisit($visit)
- {
- $curyear=date('Y');
- $visit_list= [];
- <a href="/tags.php/foreach/" target="_blank">foreach</a>($visitas$v) {
- if($curyear==date('Y',$v['visittime'])) {
- $date=date('m月d日',$v['visittime']);
- }else{
- $date=date('Y年m月d日',$v['visittime']);
- }
- $visit_list[$date][] =$v;
- }
- return$visit_list;
- }
好了上面的测试数据经过该函数之后,再把返回值打印出来,有:
- array(2) {
- ["05月10日"] =>array(3) {
- [0] =>array(6) {
- ["visit_id"] => int(127)
- ["goods_id"] => int(16)
- ["visittime"] => int(1494399935)
- ["goods_name"] => string(53)"OPPO R9s 全网通4G+64G 双卡双待手机 玫瑰金"
- ["shop_price"] => string(6)"500.00"
- }
- [1] =>array(6) {
- ["visit_id"] => int(124)
- ["goods_id"] => int(13)
- ["visittime"] => int(1494399921)
- ["goods_name"] => string(76)"SIEMENS/西门子 KA92NV09TI双开门家用对开门电冰箱变频旗舰款"
- ["shop_price"] => string(7)"4000.00"
- }
- [2] =>array(6) {
- ["visit_id"] => int(123)
- ["goods_id"] => int(27)
- ["visittime"] => int(1494399903)
- ["goods_name"] => string(85)"爱他美白金版Aptamil 幼儿配方奶粉3段(12-36个月适用)900g(欧洲进口)"
- ["shop_price"] => string(6)"329.00"
- }
- }
- ["05月08日"] =>array(1) {
- [0] =>array(6) {
- ["visit_id"] => int(120)
- ["goods_id"] => int(26)
- ["visittime"] => int(1494224263)
- ["goods_name"] => string(21)"欢乐谷免票一张"
- ["shop_price"] => string(5)"50.00"
- }
- }
- }
对的,这正是我想要的效果。
以上所述是小编给大家介绍的PHP 实现浏览记录并按日期分组,希望对大家有所帮助。在此也非常感谢大家对本网站的支持!
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