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@ 2018-11-03T17:40:23Z

<?php

$users = Array(
    Array(
            'userId' => 'user1',
            'name' => 'Suman Mandal',
            'age' => 20,
        ),
    Array(
            'userId' => 'user2',
            'name' => 'Amit Halder',
            'age' => 30,
        ),
    Array(
            'userId' => 'user3',
            'name' => 'Asif Rahman',
            'age' => 25,
        ),
    Array(
            'userId' => 'user4',
            'name' => 'Gopal Ghosh',
            'age' => 21,
    )
);
            
$marks =  Array(
    Array(
            'userId' => 'user1',
            'marks'=>80,
        ),
    Array(
            'userId' => 'user3',
            'marks'=>90, 
        )

);


$users = array_column($users, null, 'userId');
$marks = array_column($marks, null, 'userId');
$marks_sheet = array_replace($marks, $users);
var_dump($marks_sheet);

Output for git.master_jit, git.master, rfc.property-hooks: array(4) { ["user1"]=> array(3) { ["userId"]=> string(5) "user1" ["name"]=> string(12) "Suman Mandal" ["age"]=> int(20) } ["user3"]=> array(3) { ["userId"]=> string(5) "user3" ["name"]=> string(11) "Asif Rahman" ["age"]=> int(25) } ["user2"]=> array(3) { ["userId"]=> string(5) "user2" ["name"]=> string(11) "Amit Halder" ["age"]=> int(30) } ["user4"]=> array(3) { ["userId"]=> string(5) "user4" ["name"]=> string(11) "Gopal Ghosh" ["age"]=> int(21) } }

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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