[RESOLVED] how to find last index of multiarray [][]

[lli2k5]

I have an array of the form

$array[0][0]
$array[0][1]
$array[0][2]
$array[0][3]
$array[1][0]
$array[1][1]
$array[1][2]
$array[1][3]

I would like to find the last index $array[k][0] which has a value.

[bradgrafelman]

$last_index = array_keys($array);
rsort($last_index);
$last_index = $last_index[0];

echo 'Last index is: ' . $last_index;

NOTE: This doesn't actually check to see if $array[k][0] exists... it just tells you the highest index k that exists in the array. If you want to literally check that the value of this highest k is actually an array itself that contains a 0 key, you could do this:

$last_index = array_keys($array);
rsort($last_index);

for($i = 0; isset($last_index[$i]); $i++) {

if(isset($array[($last_index[$i])][0])) {
	$last_index = $last_index[$i];
	break;
}

}

echo 'Last index is: ' . $last_index;