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@ 2019-11-26T11:10:35Z

<?php

$arr = [
    [
        'id' => 10,
        'name' => 'John',
        'occupation' => 'engineer',
        'points' => 10
    ],
    [
        'id' => 10, 
        'name' => 'John',
        'occupation' => 'librarian',
        'points' => 14
    ],
    [
        'id' => 7,
        'name' => 'Sarah',
        'occupation' => 'artist',
        'points' => 21
    ],
    [
        'id' => 7,
        'name' => 'Sarah',
        'occupation' => 'teacher',
        'points' => 17
    ],  
    [
        'id' => 10,
        'name' => 'John',
        'occupation' => 'butcher',
        'points' => 7
    ],
    [
        'id' => 7,
        'name' => 'Sarah',
        'occupation' => 'engineer',
        'points' => 9
    ],
    [
        'id' => 25,
        'name' => 'Andreea',
        'occupation' => 'judge',
        'points' => 11
    ]
];

$result = [];
foreach($arr as $v){
    $result[$v["id"]][] = $v;
}
print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [10] => Array ( [0] => Array ( [id] => 10 [name] => John [occupation] => engineer [points] => 10 ) [1] => Array ( [id] => 10 [name] => John [occupation] => librarian [points] => 14 ) [2] => Array ( [id] => 10 [name] => John [occupation] => butcher [points] => 7 ) ) [7] => Array ( [0] => Array ( [id] => 7 [name] => Sarah [occupation] => artist [points] => 21 ) [1] => Array ( [id] => 7 [name] => Sarah [occupation] => teacher [points] => 17 ) [2] => Array ( [id] => 7 [name] => Sarah [occupation] => engineer [points] => 9 ) ) [25] => Array ( [0] => Array ( [id] => 25 [name] => Andreea [occupation] => judge [points] => 11 ) ) )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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