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@ 2013-10-09T20:28:32Z

<?php


function coolPluck($array, $allowed) {
        $output = array();

    foreach($allowed as $keyToFind) {
        foreach($array as $k => $v) {
            if($k === $keyToFind) {
				$output[$keyToFind] = $v;
            }

            if(is_array($v)) {
            	$results = coolPluck($v, $allowed);

                if (isset($results[$keyToFind])) {
                   	if (!isset($output[$keyToFind])) {
						$output[$keyToFind] = $results[$keyToFind];
                    }
                    else {
                        if (is_array($output[$keyToFind])) {

							$output[$keyToFind] = array_merge(array($output[$keyToFind]), $results[$keyToFind]);
                        } else {
							$output[$keyToFind] = array_merge((array)$output[$keyToFind], (array)$results[$keyToFind]);
                        }

                    }
                }

           	}
        }
	}

    return $output;
}


$testArray = array(
    'test' => array(
    	'percy' => array(
        	'percy' => array('percy' => 'anderson')
    	), 
        'mitch' => array(
        	'mitchell', 
        	'anderson'
        )
    )
);


var_dump(coolPluck($testArray, array('percy', 'mitch')));

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, string given in /in/eimuj:23 Stack trace: #0 /in/eimuj(23): array_merge(Array, 'anderson') #1 /in/eimuj(14): coolPluck(Array, Array) #2 /in/eimuj(14): coolPluck(Array, Array) #3 /in/eimuj(52): coolPluck(Array, Array) #4 {main} thrown in /in/eimuj on line 23
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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