根據當前時間對php數組進行排序

Question

我正在使用以下json數據。 （關鍵是一個時間爲hh：mm）

"chart": { 
    "23:20": 11, 
    "23:30": 11, 
    "23:40": 11, 
    "23:50": 16, 
    "00:00": 16, 
    "00:10": 14, 
    "00:20": 11, 
    "00:30": 12, 
    "00:40": 14, 
    "00:50": 10, 
    "01:00": 8, 
    "01:10": 12, 
    "01:20": 15, 
    "01:30": 13, 
    "01:40": 11, 
    "01:50": 8, 
    "02:00": 8 
} 

https://pastebin.com/cp16Rr9w

我然後將數據移動到一個PHP陣列。我想對數組進行排序，所以它從當前的服務器時間開始並從那裏開始。

目前我使用的是下面的PHP（未分類）

<?php 
    foreach ($data['chart'] as $key => $value){ 
     echo 'Time: '.$key.'Data: '.$value; 
    } 
    ?> 

Answer 1

最簡單的方法也許將與array_filter()首先過濾掉所有「太老」的條目，然後使用ksort()結果數組排序：

<?php 

function getFilter($server_time) { 
    return function($item) use($server_time) { 
     return (strtotime($item) >= $server_time); 
    }; 
} 

$data = '{"chart": { 
      "23:20": 11,"23:30": 11,"23:40": 11,"23:50": 16,"00:00": 16, 
      "00:10": 14,"00:20": 11,"00:30": 12,"00:40": 14,"00:50": 10, 
      "01:00": 8,"01:10": 12,"01:20": 15,"01:30": 13,"01:40": 11, 
      "01:50": 8,"02:00": 8 
}}'; 

$json = json_decode($data, true); 
$src = $json['chart']; 

$server_time = strtotime("now"); 

$filtered = array_filter($src, getFilter($server_time), ARRAY_FILTER_USE_KEY); 
ksort($filtered); 

print_r($filtered); 

現場測試案例：

Answer 2

function hsort($a, $b) // callback function for uksort function 
{ 
    return (floatval(str_replace(":", ".", $a)) - floatval(str_replace(":", ".", $b))) // convert each time to float value, like '01:56'-> "01.56", then compare values as float 
} 

$chart = array_flip($chart); // flip indexes with values to get ability to operate with indexes as array values (which are time in your array) 
uksort($chart, "hsort"); // sort time values 
$chart = array_flip($chart); // flip again to make time values as index again 

Answer 3

嘗試：

$data = json_decode('{"chart": { 
    "23:20": 11, 
    "23:30": 11, 
    "23:40": 11, 
    "23:50": 16, 
    "00:00": 16, 
    "00:10": 14, 
    "00:20": 11, 
    "00:30": 12, 
    "00:40": 14, 
    "00:50": 10, 
    "01:00": 8, 
    "01:10": 12, 
    "01:20": 15, 
    "01:30": 13, 
    "01:40": 11, 
    "01:50": 8, 
    "02:00": 8 
}}'); 

$data = (array) $data->chart; 

function sort_time($a, $b) { return strtotime($a) > strtotime($b); } 

uksort($data, 'sort_time'); 

foreach ($data as $key => $value) { 
    echo "$key: $value\n"; 
}