PHP implements Browse records and groups by date

This article mainly introduces the content is about PHP implementation of browsing records and grouped by date, has a certain reference value, now share to everyone, the need for friends can refer to

The existing test data is as follows, which requires the implementation of the effect as in:

array (4) {[0] = = Array (6) {["visit_id"] = = Int (127) ["goods_id"] + int (+) ["visittime"] + int (1494399935) ["goods_name"] + = string (+) "OPPO r9s all netcom 4g+64g dual sim phone rose gold" ["Shop_price"] = = String (6) "500.00"} [1] = = Array (6) {["visit_id"] = + int (124) ["goods_id"] + int (all) ["visittime"] = > int (1494399921) ["Goods_name"] + string ("siemens/") "Siemens Ka92nv09ti dual-door home-to-door refrigerator inverter flagship" ["shop_price"] = String (7) "4000.00"} [2] = = Array (6) {["visit_id"] = + int (123) ["goods_id"] + int (+) ["visittime"] = int (1494399903) ["Goods_name"] + string (85) "Love him whitening Gold Edition Aptamil infant Formula 3 paragraph (12-36 months apply) 900g (European imports)" ["shop_price"] = String (6) "329.00"} [3] = = Array (6) {["visit_id"] = + int (+) ["goods_id"] + int (+) ["visittime"] = I NT (1494224263) ["Goods_name"] + string (21) "Happy Valley" ["Shop_price"] + string (5) "50.00"}}

Before I realized that this code does not know whether to O (n) or a higher degree of complexity to achieve, think about it, in fact, the bottom of the PHP array is a hash implementation, how to simply use this feature to reduce the complexity of the O (1)?

Show Me the Code:

/* Browse records grouped by date */function groupvisit ($visit) { $curyear = date (' Y '); $visit _list = []; foreach ($visit as $v) { if ($curyear = = Date (' Y ', $v [' Visittime '])) { $date = date (' m ' D Day ', $v [' visittime ']); } else { $date = date (' Y year m D Day ', $v [' visittime ']); } $visit _list[$date] [] = $v; } return $visit _list; }

Description: The entry $visit is the first test data, the function also made some optimization of the user experience, for example, your browsing history is always showing the year, is not feeling a bit redundant, so if this year, the year will be hidden, the other years will still show up. Otherwise the code will be more concise.

Okay, the above test data passes through the function, then prints the return value:

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21st 22 23 24 25 26 27 28 29 30 31 32 33 34

Array (2) {["May 10"] = = Array (3) {[0] = = Array (6) {["visit_id"] = + int (127) ["goods_id"] + int (16) ["visittime"] = Int (1494399935) ["Goods_name"] + string (+) "OPPO r9s all netcom 4g+64g dual sim phone rose gold" ["Shop_price"] =&G T String (6) "500.00"} [1] = = Array (6) {["visit_id"] = + int (124) ["goods_id"] + int (all) ["Visittime"] =&gt ; int (1494399921) ["Goods_name"] + string ("7") "siemens/Siemens Ka92nv09ti Double-door open-door refrigerator inverter flagship model" ["Shop_price"] and "["] = string ) "4000.00"} [2] = = Array (6) {["visit_id"] = + int (123) ["goods_id"] + int (+) ["visittime"] = + int (1 494399903) ["Goods_name"] + string (85) "Love him whitening Gold Edition Aptamil infant Formula 3 paragraph (12-36 months apply) 900g (European imports)" ["Shop_price"] and string (6 ) "329.00"}} ["May 08"] = = Array (1) {[0] = = Array (6) {["visit_id"] + int (+) ["goods_id"] = = Int ( ["Visittime"] + int (1494224263) ["Goods_name"] and string (21) "Happy Valley" ["Shop_price"] and string (5) "50. 00 "}}}

That's right, that's exactly what I want.