Fluid Grid Maker

gistfile1.php

<?php
	$width = 960;
	$columns = 12;
	$margin = 10;
	$column = ($width / $columns) - (2 * $margin);
        echo '<pre>';
	$spans = '';
	for($i = 1; $i <= 12; $i++)
	{
		$spans .= '.span_' . $i . ', ';
	}
	$spans = trim($spans, ', ');
	echo $spans . '{
		float:left;
		margin: 0 ' . (($margin / $width) * 100) . '%;
	}';

	for($i = 1; $i <= 12; $i++)
	{
		echo '
		.span_' . $i . '{width: ' . ((($i * $column + ((2 * $margin) * ($i - 1))) / $width) * 100). '%;}';
	}
        echo '</pre>';
?>