Online PHP editor | refs for fdp2e

<?php $product = array('a','b','c','d'); echo '<table border="1">'; echo "<tr><th>Product 1</th><th>Product 2</th><th>Similarity</th></tr>\n"; Foreach($product as $key => $a){ Foreach(array_slice($product, $key+1) as $b){ echo '<tr><td>'.$a.'</td><td>'.$b."</td></tr>\n"; } } echo '</table>';