php 多维数组遍历
- 多维数组涉及循环嵌套
- for 循环遍历索引数组还行
- foreach 遍历数组专用
<?php$arr = [['001', 'hoang', 'HR', 'salary'],['002', 'ha', 'HR', 'tdung']];// for 循环遍历二维数组for ($i = 0; $i <= count($arr); $i++) {for ($j = 0; $j <= count($arr[$i]); $j++) {echo $arr[$i][$j];echo '<br>';}}$arr = [['id' => '001', 'name' => 'hoang', 'dep' => 'HR', 'work' => 'salary'],['id' => '002', 'name' => 'ha', 'dep' => 'HR', 'work' => 'tdung']];foreach ($arr as $results) {foreach ($results as $key => $res) {echo $key . '--' . $res;echo '<hr>';}}
[http://help10086.cn/0118/demo2.php]
购物车商品总结的计算
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>购物车求和</title></head><body><?php$arr = [['id' =>'1', 'name' => 'iphone10', 'num' => 1, 'price' => 8000], ['id' => '2','name' => 'iphone11', 'num' => 2, 'price' => 10000], ['id' => '3', 'name' =>'iphone12', 'num' => 4, 'price' => 12000], ['id' => '4', 'name' =>'iphone13', 'num' => 2, 'price' => 11000], ]; function getvalSum($arr) {foreach ($arr as $goods) { foreach ($goods as $val) { // print_r($val);$total = $goods['num'] * $goods['price']; $valSam += $total; }; }; echo$valSam; } ?><h2>购物车求和</h2><table border="1" width="480px" cellspacing="0" style="text-align:center;"><thead style="background-color: #f50303;height: 40px;font-size: 18px;"><tr><td>id</td><td>品名</td><td>数量</td><td>单价</td><td>小计</td></tr></thead><tbody><?php foreach ($arr as $value) : ?><tr><td><?php echo $value['id'] ?></td><td><?php echo $value['name'] ?></td><td><?php echo $value['num'] ?></td><td><?php echo $value['price'] ?></td><td><?php echo $value['num'] * $value['price'] ?></td></tr><?php endforeach; ?><tr style="background-color: yellow;"><td colspan="4">总计</td><!-- <td>1</td> --><!-- <td>1</td> --><!-- <td>1</td> --><td><?php getvalSum($arr) ?></td></tr></tbody></table></body></html>
