按时间顺序对数组进行排序,日期为关键字-php

时间:2016-11-15 22:15:19

标签: php arrays sorting

我基本上有这个代码来确定数组中相同日期的数量:

function get_archives_html ($blog) {
    //tag array to store arrays with same tag
    $count_tags = array();


    //store output
    $output = '';

    foreach($blog as $id) {
        //abbreviate date name
        $originalDate = $id["date"]["year"].'-'.$id["date"]["month"].'-'.$id["date"]["day"];
        $abbrevDate = date("F, Y", strtotime($originalDate));

        if(!isset($count_tags[$abbrevDate])) {
            $count_tags[$abbrevDate] = 0;
        }

        ++$count_tags[$abbrevDate];
    }

    // Sort your tags from hi to low
    //arsort($count_tags);
    var_dump($count_tags);




    foreach($count_tags as $month=>$id) {
        $output.= '<p><a href="#">'. $month.($id > 1 ? ' ('.$id .')' : '').'</a></p>';
    }

    return $output;
}

输出如下:

 $arr = array(
        "November, 2016" => "2",
        "October, 2016" => "5",
        "October, 2017" => "3",
        "September, 2017" => "6" 
    );

现在,我使用键在html上显示它。问题是它没有按日期排列,而是按字母排列。

所以,我的问题是,如何按键和按日期对此数组进行排序。示例将是2016年10月,2016年11月,2017年9月,2014年10月谢谢

1 个答案:

答案 0 :(得分:1)

<?php
$arr = array(
        "November, 2016" => "2",
        "October, 2016" => "5",
        "October, 2017" => "3",
        "September, 2017" => "6" 
);

//Sort by ascending date in the key
uksort($arr,function($a,$b){
  return strtotime(strtr($a,',',' '))<=>strtotime(strtr($b,',',' '));
});

//result
$expected = array (
  'October, 2016' => "5",
  'November, 2016' => "2",
  'September, 2017' => "6",
  'October, 2017' => "3",
);

var_dump($arr === $expected);  //bool(true)