search two-dimensional array

alexei999

Hi there, does anybody have any idea how i can get a key of the value in a two-dimenional array ?
this is how my array looks: and let's say i need to get a key for value 4. (it should show me something like [1][3] ?? or something like it ?

Array
(
[1] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)

[2] => Array
    (
        [0] => 6
        [1] => 7
        [2] => 8
        [3] => 9
        [4] => 10
    )

[3] => Array
    (
        [0] => 11
        [1] => 12
        [2] => 13
        [3] => 14
        [4] => 15
    )

[4] => Array
    (
        [0] => 16
        [1] => 17
        [2] => 18
        [3] => 19
        [4] => 20
    )

)

bbaassiri

are you interested in getting the values of 1 and 3 for the example of finding the number 4

alexei999

yeah, that's exactly what i'm looking for, if possible!!!

Thanks.

dawson1323

not too sure what the question is but here are some thoughts:

array[1][3]; will give you 4.

$num = value you are looking for;

for ($i=0; $i < 5; $i++)
      {

     for ($j=0; $j < 5; $j++)
      {
         $temp = array[$i][$j];

         if ($temp = $num)
           {
               echo $i . ", " . $j ;
           }
       }
   }

Hope that helps some.

-D

bbaassiri

heres something that works but its a bit more complex

$sort = array ( 
	1 => Array ( 
		0 => 1 
		,1 => 2 
		,2 => 3 
		,3 => 4 
		,4 => 5 
			) 
	,2 => Array ( 
		0 => 6 
		,1 => 7 
		,2 => 8 
		,3 => 9 
		,4 => 10 
			) 
	,3 => Array ( 
		0 => 11 
		,1 => 12 
		,2 => 13 
		,3 => 14 
		,4 => 15 
			) 
	,4 => Array ( 
		0 => 16 
		,1 => 17 
		,2 => 18 
		,3 => 19 
		,4 => 20 
		) 
	);
$look['look']=4;
$look['found']=0;
array_walk( $sort , 'lookup' , &$look);
print_r($found);

function lookup($array_struct , $idx ,  &$look)
{
	foreach($array_struct as $i => $value)
	{
		if (0 == $look['found']) {
			if ( $look['look'] == $value) {
				//since pass by reference this value always changes
				//we can not assign idx to row because idx changes with each iteration of the array
				//
				ob_start();
				echo $idx;
				$look['row']  = ob_get_contents ();
				ob_end_clean();
				$look['col']  = $i;
				$look['found']  = 1;
			}
		}
	}
} // end func

Weedpacket

$array = array(
	1=>array(1,2,3,4,5),
	2=>array(6,7,8,9,10),
	3=>array(11,12,13,14,15),
	4=>array(16,17,18,19,20)
);


$wanted = 4;

$hit=false;
foreach($array as $key1=>$row)
{	foreach($row as $key2=>$entry)
	{	if($entry==$wanted)
		{	$hit=true;
			break 2;
		}
	}
}

if($hit)
{	echo "\$array[$key1][$key2]==$wanted";
}
else
{	echo "$value is not in the array.";
}