數組合並保持相同的順序？

我有一個數組，它是一個數組的數組，按日期排序，像這樣：數組合並保持相同的順序？

Array 
(
    [1379167200] => Array 
     (
      [110] => Introduction to Banking | Saturday, September 14, 2013 - 10:00am 
     ) 

    [1380376800] => Array 
     (
      [71] => Saving, Investing, Debt | Saturday, September 28, 2013 - 10:00am 
     ) 

    [1381588200] => Array 
     (
      [72] => Setting Personal Goals | Saturday, October 12, 2013 - 10:30am 
     ) 

    [1382796000] => Array 
     (
      [74] => Type of Account: What's Right for You? | Saturday, October 26, 2013 - 10:00am 
     ) 

    [1384009200] => Array 
     (
      [81] => Creating an Account: Learning to Budget | Saturday, November 09, 2013 - 10:00am 
     ) 
)

我想保持順序（即按日期排序），但最好只包括最內數組項中的單個數組。像這樣：

Array 
(
     [110] => Introduction to Banking | Saturday, September 14, 2013 - 10:00am 

     [71] => Saving, Investing, Debt | Saturday, September 28, 2013 - 10:00am 

     [72] => Setting Personal Goals | Saturday, October 12, 2013 - 10:30am 

     [74] => Type of Account: What's Right for You? | Saturday, October 26, 2013 - 10:00am 

     [81] => Creating an Account: Learning to Budget | Saturday, November 09, 2013 - 10:00am 
)

這怎麼可能？我需要將整數轉換爲字符串還是其他？

我絕對需要按日期維護排序，但我也需要維護整數鍵和值之間的關係，兩者都用到。

來源

2013-10-10 Andrew Alexander

迭代通過陣列中，創建新的數組：

$newArray = Array(); 
foreach($array as $row) { // $row is subarray 
    $value = current($row); // first value in subarray "Itroduction to ..." 
    $key = key($row); // first key in subarray 101, 71, 72 
    $newArray[$key] = $value; 
}

演示;

http://codepad.viper-7.com/dd3PLV

文檔：

來源

2013-10-10 21:29:35 Peter

數組合並保持相同的順序？

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