Question

我有一个由日期和两个空格后的实际条目组成的聊天记录。现在我需要在输入时对其进行排序，但是当日期相同时，保持条目的顺序相同。

Array
(
    [0] => '6/4 17:01:30.001  X'
    [1] => '6/4 17:01:30.003  B'
    [2] => '6/4 17:01:30.003  C'
    [3] => '6/4 17:01:30.003  A'
    [4] => '6/4 17:01:30.002  Y'
)

我已经尝试过几件事，创建一个在日期中拆分的多维数组，使用几种不同的算法对值进行排序，但我非常确定必须有一些非常简单，明显的方法来做到这一点多圈。

结果应如下所示：

Array
(
    [0] => '6/4 17:01:30.001  X'
    [4] => '6/4 17:01:30.002  Y'
    [1] => '6/4 17:01:30.003  B'
    [2] => '6/4 17:01:30.003  C'
    [3] => '6/4 17:01:30.003  A'
)

Answer 1

我们可以利用您的日期字符串按正确顺序排序的事实。只需将其用作密钥并执行ksort：

// Starting array
$aArray = array(
    '6/4 17:01:30.001  X',
    '6/4 17:01:30.002  Y',
    '6/4 17:01:30.003  B',
    '6/4 17:01:30.003  C',
    '6/4 17:01:30.003  A'
);

// Parse out the date and use it as a key. There might be a better regex to use here, but this works...
$aKeyed = array();
foreach($aArray as $value)
{
    preg_match('/([0-9]*\/[0-9]* [0-9]*:[0-9]*:[0-9]*\.[0-9]*)  (.*)/', $value, $aMatches);
    $aKeyed[$aMatches[1]][] = $aMatches[0];
}

// Sort by key.
ksort($aKeyed);

// Iterate the keyed array to get values into the output array. Order is preserved since we appended things to the value of the keyed array in the correct order.
$aOut = array();
foreach($aKeyed as $aValue)
{
    foreach($aValue as $value)
    {
        // Although there are t2 loops, the total number of iterations is the same as the single loop above.
        $aOut[] = $value;
    }
}

// Print results.
var_export($aOut);

输出：

array (
  0 => '6/4 17:01:30.001  X',
  1 => '6/4 17:01:30.002  Y',
  2 => '6/4 17:01:30.003  B',
  3 => '6/4 17:01:30.003  C',
  4 => '6/4 17:01:30.003  A',
)

按日期排序PHP排序数组（Chatlog）（保持等效日期的顺序）

1 个答案: