[RESOLVED] comparing a 2 dimensional array

[jrough]

I have a matrix of ID's and dates.
I want only the unique ID's with the biggest date, for example,
1, 6/1/2012,
2/6/12/2012,
3, 7/4/2011.

I can't figure out how to compare only the id's I want and then compare the dates to get the greatest date. See the line with the asterisks, there is a syntax error.
Thanks,

$myarr = array(
array('id', 'date'),
array(1, '05/01/2012'),
array(1, '06/01/2012'),
array(2, '06/01/2012'),
array(2, '06/12/2012'),
array(3, '07/1/2011'),
array(3, '07/04/2011')	

);
echo "<br />";
print_r($myarr2);
var_dump($array_unique);
$i=0;


$unique = array_unique($myarr['id']);

while($unique[$i] ){
	for ($row = 0; $row <6; $row ++){
		for ( $column = 0; $column < 2; $column++ ){
		    $temp[$row][$column]=$myarr[$row][$column];
****	if ($temp[$column]= unique[$i] && $temp[$row]> $myarr[$column +1 ] ){
			  $temp[$row][$column] =$myarr[$row][$column+1];
			}
	}
	$i++;
	print_r($myTbl);
}//end while

[NogDog]

There may be something more elegant, but this seems to work:

<?php
$myarr = array(
	array(1, '05/01/2012'),
	array(1, '06/01/2012'),
	array(2, '06/01/2012'),
	array(2, '06/12/2012'),
	array(3, '07/1/2011'),
	array(3, '07/04/2011')
);

$result = array();
foreach($myarr as $arr) {
	if( ! isset($result[$arr[0]])) {
		$result[$arr[0]] = $arr[1];
	}
	elseif(strtotime($arr[1]) > strtotime($result[$arr[0]])) {
		$result[$arr[0]] = $arr[1];
	}
}

echo "<pre>".print_r($result,1)."</pre>";