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@ 2015-11-19T23:07:53Z

<?php

$data = array(
    array(
        'name' => 'Supplier A',
        'productName' => 'ABC',
    ),
    array(
        'name' => 'Supplier B',
        'productName' => 'ABC',
    ),
    array(
        'name' => 'Supplier B',
        'productName' => 'DEF',
    ),
    array(
        'name' => 'Supplier C',
        'productName' => 'XYZ',
    ),
    array(
        'name' => 'Supplier D',
        'productName' => 'BBB',
    ),
    array(
        'name' => 'Supplier E',
        'productName' => 'ABCDEF',
    ),
    array(
        'name' => 'Supplier F',
        'productName' => 'ABCDEF',
    ),
);

$result = array_filter(
    $data,
    function($value) use ($data) {
        echo 'TEST', PHP_EOL;
        return count(array_filter(
            $data,
            function ($match) use ($value) {
                echo $match['productName'], ' => ', $value['productName'], PHP_EOL;
                return $match['productName'] === $value['productName'];
            }
        ) > 1);
    }
);
var_dump($result);

Output for git.master, git.master_jit: TEST ABC => ABC ABC => ABC DEF => ABC XYZ => ABC BBB => ABC ABCDEF => ABC ABCDEF => ABC Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, bool given in /in/7O30Y:44 Stack trace: #0 [internal function]: {closure}(Array) #1 /in/7O30Y(34): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/7O30Y on line 44
Process exited with code 255.
Output for rfc.property-hooks: TEST ABC => ABC ABC => ABC DEF => ABC XYZ => ABC BBB => ABC ABCDEF => ABC ABCDEF => ABC Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, true given in /in/7O30Y:44 Stack trace: #0 [internal function]: {closure}(Array) #1 /in/7O30Y(34): array_filter(Array, Object(Closure)) #2 {main} thrown in /in/7O30Y on line 44
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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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