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@ 2014-10-04T09:15:12Z

<?php

$infoArray =array( 
                array(
                    'season'=>'winter 2014', 
                    'link'=>'link1'
                    ),
                array(
                    'season'=>'summer 2013', 
                    'link'=>'link2'
                    ),
                array(
                    'season'=>'fall 2012', 
                    'link'=>'link3'
                    ),
                array(
                    'season'=>'summer 2014', 
                    'link'=>'link4'
                    ),
                array(
                    'season'=>'winter 2013', 
                    'link'=>'link5'
                    )
            );

$newArray =array();
$innerArray=array();

foreach ($infoArray as $info){
            $season = explode(" ", $info['season']);
            $seasonName = $season[0];
            $seasonYear = $season[1];


        if (array_key_exists($seasonYear, $newArray)) {
                    $newArray[$seasonYear][$seasonName]=$info['link'] ;
            }
        else {
            $innerArray[$seasonName] = $info['link'];
            $newArray[$seasonYear]=$innerArray ;
        }

}

var_dump($newArray);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { [2014]=> array(2) { ["winter"]=> string(5) "link1" ["summer"]=> string(5) "link4" } [2013]=> array(2) { ["winter"]=> string(5) "link5" ["summer"]=> string(5) "link2" } [2012]=> array(3) { ["winter"]=> string(5) "link1" ["summer"]=> string(5) "link2" ["fall"]=> string(5) "link3" } }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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