通过第二级键对多维数组进行排序 [英] Sort multidimensional array by second-level key

问题描述

我有一个看起来像这样的数组:

I have an array that looks like this:

array(3) { 
    ["Fall Quarter 2012"]=> array(2) { 
          [20121018]=> array(1) { 
              ["agenda"]=> string(55) "Fall_2012/Agenda_20121018.pdf" 
          }
          [20121011]=> array(2) { 
              ["agenda"]=> string(55) "Fall_2012/Agenda_20121011.pdf" 
              ["minutes"]=> string(56) "Fall_2012/Minutes_20121011.pdf" 
          } 
    } 
    ["Spring Quarter 2012"]=> array(1) { 
          [20120413]=> array(1) { 
              ["agenda"]=> string(57) "SPRing_2012/Agenda_20120413.pdf" 
          } 
    } 
    ["Summer Quarter 2012"]=> array(1) { 
          [20120610]=> array(2) { 
              ["agenda"]=> string(57) "Summer_2012/Agenda_20120610.pdf" 
              ["minutes"]=> string(58) "Summer_2012/Minutes_20120610.pdf" 
          } 
    } 
 }

我想使用日期键对它进行排序，以使季度按秋季/夏季/春季的正确顺序排列.看起来应该像这样:

And I'd like to sort it using date keys so that quarters are in the right order Fall/Summer/Spring. Which should look like this:

array(3) { 
    ["Fall Quarter 2012"]=> array(2) {
          [20121018]=> array(1) { 
              ["agenda"]=> string(55) "Fall_2012/Agenda_20121018.pdf" 
          }
          [20121011]=> array(2) { 
              ["agenda"]=> string(55) "Fall_2012/Agenda_20121011.pdf" 
              ["minutes"]=> string(56) "Fall_2012/Minutes_20121011.pdf" 
          } 
    }
    ["Summer Quarter 2012"]=> array(1) { 
          [20120610]=> array(2) { 
              ["agenda"]=> string(57) "Summer_2012/Agenda_20120610.pdf" 
              ["minutes"]=> string(58) "Summer_2012/Minutes_20120610.pdf" 
          } 
    } 
    ["Spring Quarter 2012"]=> array(1) { 
          [20120413]=> array(1) { 
              ["agenda"]=> string(57) "SPRing_2012/Agenda_20120413.pdf" 
          } 
    } 
 }

是否可以通过使用日期排序来获得此结果，还是应该使用 uksort ()函数以我自己的模式对四分之一进行排序?

Is there a way to get this result by sorting using date, or should I use uksort() function to sort quarters with my own pattern?

请让我知道您的想法！谢谢！

Please, let me know what you think! Thank you!

推荐答案

您应该使用uasort函数.您的代码可能看起来像这样:

you should use the uasort function. Your code could look something like this:

function myComparison($a, $b){
    return (key($a) > key($b)) ? -1 : 1;
} 

uasort ( $quarters , 'myComparison' );

例如，将使用$quarters["Fall Quarter 2012"]["20121018"]进行排序

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