Please help change my code

[johnsmith153]

The code below will return a value from a multi-dimensional array. I need to do the opposite of what the code does by providing a value and returning the keys, e.g. it would return array('key1', 'key2', 'key3', 'key4'); etc. - can anyone help?

 

function GetArrKey( $findArr, $key_arr, $depth=0 )
{
        if( count($key_arr) <= $depth || !array_key_exists($key_arr[$depth], $findArr) )
                return NULL;
        else if( count($key_arr) == $depth+1 )
                return $findArr[$key_arr[$depth]];
        
        return GetArrKey( $findArr[$key_arr[$depth]], $key_arr, $depth+1 );
}
$value = GetArrKey( $array, array( "key1", "key2", "key3", "key4" ) );

[Jessica]

How do you want it to behave if the value exists at multiple "locations" in the multidimensional array?

[Jessica]

<?php
$myArr = array();
$myArr['test']['testing'][1] = "dont find me";
$myArr[1][2][3] = "test";
$myArr['one']['two'][1] = "foo";
$myArr['one']['two'][2] = "bar";

function getArrKeys($arr, $value, $existingKeys=NULL){
if(!$existingKeys){
	$existingKeys = array();
}
if(is_array($arr)){
	$key = array_search($value, $arr);
	if($key !== FALSE){
		$existingKeys[] = $key;
	}else{
		foreach($arr AS $k=>$a){
			$key = getArrKeys($a, $value, $existingKeys);
			if($key){
				$existingKeys[] = $k;
				$existingKeys = array_merge($existingKeys, $key);
				return $existingKeys;
			}
		}
	}
	if(count($existingKeys)){
		return $existingKeys;
	}else{
		return FALSE;
	}
}else{
	return FALSE;
}
}
print '<pre>';
print "Foo
";
print_r(getArrKeys($myArr, "foo"));
print "Bar
";
print_r(getArrKeys($myArr, "bar"));
print "find me
";
print_r(getArrKeys($myArr, "find me"));
print "test
";
print_r(getArrKeys($myArr, "test"));
?>

 

Results:

Foo
Array
(
    [0] => one
    [1] => two
    [2] => 1
)
Bar
Array
(
    [0] => one
    [1] => two
    [2] => 2
)
find me
test
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)

[johnsmith153]

Hi,

 

Just seen this and I'll give it a test.

 

As to your question, it shouldn't exist at multiple locations (if the values are correct). I'll look at your code and see if you've included something to deal with that. Maybe another multi-dimensional array could be returned??

 

Thanks for taking the time to look at this.

[Jessica]

I didn't, this will only find the first instance of it. You'd have to switch to array_keys as per the docs on array_search

[johnsmith153]

Works perfectly. Thanks again.