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@ 2019-11-02T14:28:48Z

<?php

$arr = [
    0 => [
        "SERIAL" => "qwerty",
        "BRANCH" => "TEST1"
    ],
    1 => [
        "SERIAL" => "qwer",
        "BRANCH" => "TEST1"
    ],
    2 => [   // RETURN THIS AS ERROR AS THE BRANCH "TEST1" has already "qwerty" serial
        "SERIAL" => "qwerty",
        "BRANCH" => "TEST2"
    ],
    3 => [
        "SERIAL" => "qwerty",
        "BRANCH" => "TEST1"
    ],
    4 => [   // RETURN THIS AS ERROR AS THE BRANCH "TEST1" has already "qwerty" serial
        "SERIAL" => "qwerty",
        "BRANCH" => "TEST3"
    ],
];

foreach($arr as $sub){
    $result[$sub['SERIAL']][] = $sub['BRANCH'];
}

foreach($result as $branches){
    $unique = array_unique($branches);
    if(count($unique) >1){
        var_dump("ERROR:", array_slice($unique,1));
    }
}

Output for git.master, git.master_jit, rfc.property-hooks: string(6) "ERROR:" array(2) { [0]=> string(5) "TEST2" [1]=> string(5) "TEST3" }

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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