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@ 2016-08-10T08:52:19Z

<?php
    $array = [
        'plants'=>[
            'fruits'=>['hard'=>'coconut','juicy'=>'mango'],
            'non-edible'=>'bambo'
        ],
        'professions'=>[
            'service'=>[
                'contractors'=>['math'=>'accountant']
            ],
            'industry'=>'engineer'
        ],
        'my_jobs'=>['first'=>'bartender','recent'=>'engineer']
    ];
function pathFinder($target, array $source, $parentPath=''){
    $results=[];
    foreach($source as $k => $v){
        $path = $parentPath.'/'.$k; //current path
        //if element is array, recurse and import found results
        if(is_array($v) && $result=pathFinder($target, $v,$path)){
            foreach($result as $r) array_push($results,$r);
        }
        elseif($v===$target) $results[]=$path; //add any match to results

    }
    return $results;
}
print_r(pathFinder('engineer',$array));
print_r(pathFinder('missing data',$array));

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => /professions/industry [1] => /my_jobs/recent ) Array ( )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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