我正在研究演算法以在網站上顯示我的事件。我想按特定鍵值對我的多維陣列進行排序。
我的陣列：
["2022-02-28"]=>
array(1) {
[0]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
}
["2022-03-01"]=>
array(2) {
[2]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
[3]=>
array(3) {
["post_id"]=>
string(4) "3784"
["time"]=>
string(5) "13:00"
["priority"]=>
string(1) "0"
}
}
["2022-03-03"]=>
array(1) {
[5]=>
array(3) {
["post_id"]=>
string(4) "3663"
["time"]=>
string(5) "13:06"
["priority"]=>
string(1) "1"
}
}
}
我想按“時間”鍵值對陣列進行排序。因此，例如在這個索引處：
["2022-03-01"]=>
array(2) {
[2]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
[3]=>
array(3) {
["post_id"]=>
string(4) "3784"
["time"]=>
string(5) "13:00"
["priority"]=>
string(1) "0"
}
}
我希望先出現 13:00，然后出現 16:05。提前謝謝你的幫助！:)
uj5u.com熱心網友回復：
試試這個：
<?php
$arr = array();
$arr["2022-02-28"] = [
array("post_id"=>"3656", "time"=>"16:05", "priority"=>"0"),
array("post_id"=>"4856", "time"=>"13:05", "priority"=>"3")];
$arr["2022-03-01"] = [
array("post_id"=>"3656", "time"=>"16:05", "priority"=>"0"),
array("post_id"=>"3636", "time"=>"13:05", "priority"=>"1")
];
foreach($arr as $key => $value){
usort($value, function($a,$b){
return strtotime($a["time"])>strtotime($b["time"]);
});
$arr[$key] = $value;
}
echo "<pre>";
var_dump($arr);
echo "</pre>";
輸出：
array(2) {
["2022-02-28"]=>
array(2) {
[0]=>
array(3) {
["post_id"]=>
string(4) "4856"
["time"]=>
string(5) "13:05"
["priority"]=>
string(1) "3"
}
[1]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
}
["2022-03-01"]=>
array(2) {
[0]=>
array(3) {
["post_id"]=>
string(4) "3636"
["time"]=>
string(5) "13:05"
["priority"]=>
string(1) "1"
}
[1]=>
array(3) {
["post_id"]=>
string(4) "3656"
["time"]=>
string(5) "16:05"
["priority"]=>
string(1) "0"
}
}
uj5u.com熱心網友回復：
使用usort定義自定義排序。
function time_sort(array $arr){
usort($arr, function($a, $b){
return strcmp($a['time'], $b['time']);
});
}
轉載請註明出處，本文鏈接：https://www.uj5u.com/qukuanlian/435834.html