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@ 2019-08-08T06:13:48Z

<?php

$array1 = [
    1 => "tenants",
    2 => "modules",
];

$array2 = [
        "prefix" => "tenants",
        "slug" => "tenants",
        "child" => [
            [
                "prefix" => "modules/{id}",
                "slug" => "modules"
            ],
            [
                "prefix" => "fetch/{id}",
                "slug" => "fetch"
            ],

        ],
    ];
    
    
function getFromChild($item, $asd) {
    if (!is_array($item)) return [];
    $res = [];
    if ($item["slug"] == $asd)
        $res[] = $item['prefix'];
    if (isset($item['child']))
        foreach($item['child'] as $child)
            $res = array_merge($res, getFromChild($child, $asd));
    return $res;
}

$res = [];
foreach ($array1 as $asd) {
    $res = array_merge($res, getFromChild($array2, $asd));
}
print_r($res);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => tenants [1] => modules/{id} )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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