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@ 2013-08-02T13:04:05Z

<?php
function getCollectionParentIDFromChildID($cID) {
    if(is_numeric($cID)) {
        if($cID > 1) {
            return '1';
        }
        if($cID == 1) {
            return '0';
        }
    }
    return null;
}

function populateParentIDArray_current($cID) {
    global $cParentIDArray;
	$cParentID = getCollectionParentIDFromChildID($cID);
	if($cParentID > -1) {
		if(!in_array($cParentID, $cParentIDArray)) {
			$cParentIDArray[] = $cParentID;
		}
		populateParentIDArray_current($cParentID);
	}
}

function populateParentIDArray_new($cID) {
    global $cParentIDArray;
	$cParentID = getCollectionParentIDFromChildID($cID);
	if(is_numeric($cParentID)) {
		if(!in_array($cParentID, $cParentIDArray)) {
			$cParentIDArray[] = $cParentID;
		}
		if($cParentID > 0) {
			populateParentIDArray_new($cParentID);
		}
	}
}

function runTest($cID) {
    global $cParentIDArray;
    echo "Test case for "; var_dump($cID);
    $cParentIDArray = array();
    populateParentIDArray_current($cID);
    echo "CURRENT: \n";
    var_dump($cParentIDArray);
    $cParentIDArray = array();
    populateParentIDArray_new($cID);
    echo "CURRENT: \n";
    var_dump($cParentIDArray);
}
runTest('3');
runTest('1');
runTest('0');
runTest(3);
runTest(1);
runTest(0);
runTest(null);
runTest('');

Output for git.master, git.master_jit, rfc.property-hooks: Test case for string(1) "3" CURRENT: array(2) { [0]=> string(1) "1" [1]=> string(1) "0" } CURRENT: array(2) { [0]=> string(1) "1" [1]=> string(1) "0" } Test case for string(1) "1" CURRENT: array(1) { [0]=> string(1) "0" } CURRENT: array(1) { [0]=> string(1) "0" } Test case for string(1) "0" CURRENT: array(0) { } CURRENT: array(0) { } Test case for int(3) CURRENT: array(2) { [0]=> string(1) "1" [1]=> string(1) "0" } CURRENT: array(2) { [0]=> string(1) "1" [1]=> string(1) "0" } Test case for int(1) CURRENT: array(1) { [0]=> string(1) "0" } CURRENT: array(1) { [0]=> string(1) "0" } Test case for int(0) CURRENT: array(0) { } CURRENT: array(0) { } Test case for NULL CURRENT: array(0) { } CURRENT: array(0) { } Test case for string(0) "" CURRENT: array(0) { } CURRENT: array(0) { }

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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2016-08-14 Arrow functions - withdrawn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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