使用键作为时间对数组进行排序，格式为xx：xx

问题描述：

I have this associate array below

["12:00" => "Lunch", "07:00" => "Arrival", "07:15" => "Start Tour"]

I want to print it in as below ascending by time (key)

7:00 => Arrival
7:15 => Start Tour
12:00 => Lunch

So far what I've tried is below

$arr = ["12:00" => "Lunch", "07:00" => "Arrival", "07:15" => "Start Tour"];

function timecomp($a,$b)
{
    // Subtracting the UNIX timestamps from each other.
    // Returns a negative number if $b is a date before $a,
    // otherwise positive.
    return strtotime($b[0])-strtotime($a[0]);
}
uasort($arr,'timecomp');

print_r($arr);

It print this

Array
(
    [07:15] => Start Tour
    [07:00] => Arrival
    [12:00] => Lunch
)

我在下面有这个关联数组 p>

  [“12：  00“=＆gt;  “午餐”，“07:00”=＆gt;  “抵达”，“07:15”=＆gt;  “开始游览”] 
  code>  pre> 
 
 我想按时间（按键）升序打印下来 p> 
 
 
   7:00 =＆gt; 到达
7：15 =＆gt; 开始游览
12：00 =＆gt; 午餐
  code>  pre> 
 
 到目前为止，我尝试过的是 p> 
 
 
  $ arr = [“12:00”  =＆GT;  “午餐”，“07:00”=＆gt;  “抵达”，“07:15”=＆gt;  “开始游览”]; 
 
函数timecomp（$ a，$ b）
 {
 //从彼此中减去UNIX时间戳。
如果$ b是$ a之前的日期，则返回一个负数 ，
 //否则为正。
返回strtotime（$ b [0]） -  strtotime（$ a [0]）; 
} 
uasort（$ arr，'timecomp'）; 
 
print_r（$ arr  ）; 
  code>  pre> 
 
 打印此 p> 
 
 
  Array 
（
 [07:15] =＆gt; 开始游览
 [07:00] =＆gt;到达
 [12:00] =＆gt;午餐
）
  code>  pre> 
  div>

答

As long as your time strings use 24-hour hours and leading zeroes, you can just use ksort():

$a = ["12:00" => "Lunch", "07:00" => "Arrival", "07:15" => "Start Tour"];
ksort($a);
print_r($a);

Result:

Array
(
    [07:00] => Arrival
    [07:15] => Start Tour
    [12:00] => Lunch
)

使用键作为时间对数组进行排序，格式为xx：xx

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