此脚本的目的:
编写一个以 1 为步从 1 到 10 的脚本。对于每个数字,显示该数字是奇数还是偶数,如果该数字是质数,还显示一条消息。在 HTML 表格中显示此信息。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Exercise 1</title>
<link rel="stylesheet" type="text/css" href="common.css" />
<style type="text/css">
th { text-align: left; background-color: #999; }
th, td { padding: 0.4em; }
tr.alt td { background: #ddd; }
</style>
</head>
<body>
<h2>Exercise 1</h2>
<table cellspacing="0" border="0" style="width: 20em; border: 1px solid #666;">
<tr>
<th>Number</th>
<th>Parity</th>
<th>Primality</th>
</tr>
<?php
$n=10;
for ($i=1;$i<=$n;$i++){
echo ($i%2 != 0)? '<tr class = "alt">':'<tr>'; ?>
<td><?php echo $i; ?></td>
<td><?php echo ($i%2 != 0)? "Odd":"Even";?></td>
<td><?php
$k=0;
for ($j=1;$j<=$i;$j++){
if ($i%$j=0) $k++; //Where the error occurs
}
echo ($k=2 || $k=1)?"Prime":"Composite";?>
</td></tr>
<?php
}
?>
</table>
</body>
</html>