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@ 2015-03-10T17:31:29Z

<?php


$testarr = array(
    'advertiser' => array(
            'id'=>345343,
            'name'=>'Advertiser123',
            'agency' => array(
                   'id'=>345343,
                    'name'=>'Agency456',
                    'organisation' => array(
                       'id'=>223334,
                        'name'=>'Organisation456'
                    )
                )
    )
);

function getkeypath($arr, $lookup)
{
    if (in_array($lookup, $arr))
    {
        return array($lookup);
    }
    else
    {
        foreach ($arr as $key => $subarr)
        {
            if (is_array($subarr))
            {
                $ret = getkeypath($subarr, $lookup);

                if ($ret)
                {
                    $ret[] = $key;
                    return $ret;
                }
            }
        }
    }

    return null;
}

echo '$testarr: ' . "\n";
print_r($testarr);
echo "\n" . '7: ' . "\n" . print_r(getkeypath($testarr, 223334), true) . "\n";

Output for git.master, git.master_jit, rfc.property-hooks: $testarr: Array ( [advertiser] => Array ( [id] => 345343 [name] => Advertiser123 [agency] => Array ( [id] => 345343 [name] => Agency456 [organisation] => Array ( [id] => 223334 [name] => Organisation456 ) ) ) ) 7: Array ( [0] => 223334 [1] => organisation [2] => agency [3] => advertiser )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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