9*9乘法表
简单实现
嵌套for循环
<?php
$sum=0;
for ($i=1; $i<=9; $i++) {
for ($j=1; $j<=$i; $j++) {
$sum=$i*$j;
echo $j,"*",$i,"=",$sum;
echo " ";
}
echo "<br>";
}
?>
运行结果
在表格中实现
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表格</title>
</head>
<body>
<table>
<?php for ($i=1; $i <=9; $i++){?>
<?php if ($i%2!=0){?>
<tr style="background-color: #0fff00">
<?php }else{ ?>
<tr><?php } ?>
<?php for ($j=1; $j<=$i; $j++) {?>
<td width="80px">
<?php
$sum=$i*$j;
echo $j,"*",$i,"=",$sum;
?>
</td>
<?php } ?>
</tr>
<?php } ?>
</table>
</body>
</html>
运行结果
