<?php
// Get matrix size
$rowSize = $_POST['rw'];
$colSize = $_POST['col'];
?>
<?php
// Construct matrix
$shiftable = array();
for($i = 0; $i < $rowSize; $i++){
	$temp = array();
	for($j = 0; $j < $colSize; $j++){
		array_push($temp, $j);
	}
	array_push($shiftable, $temp);
	shiftRow($shiftable, $i, $i);	// Shift matrix accordingly
}
?>
<pre>
<?php
// Print matrix
foreach($shiftable as $row){
	foreach($row as $j => $value){
		echo str_pad($value, 2, ' ', STR_PAD_LEFT);
	}
	echo "\n";
}
?>
</pre>
<?php
// Row shifting function
function shiftRow(&$dArray, $shiftRow, $shiftAmount){
	for($i = 0; $i < $shiftAmount; $i++){
		array_push($dArray[$shiftRow], array_shift($dArray[$shiftRow]));
	}
}
?>