<?php
$max_length = 9;
?>
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="initial-scale=1.0">
<title>九九</title>
<style>
table{
border-collapse:collapse;
}
th,td{
border:solid 1px black;
text-align:center;
}
th{
background:lavender;
}
</style>
</head>
<body>
<h1>九九表</h1>
<table>
<caption>九九</caption>
<col span="10" style="width:2em;">
<tr>
<?php
for($column = ""; $column <= $max_length; $column++){
?>
<th><?php print $column; ?></th>
<?php
}
?>
</tr>
<?php
for($row = 1; $row <= $max_length; $row++){
?>
<tr><th><?php print $row;?></th>
<?php
for($column = 1; $column <= $max_length; $column++){
?>
<td><?php print 0; ?></td>
<?php
}
?>
</tr>
<?php
}
?>
</table>
</body>
</html>