PHP 二维数组的遍历,数据的输出

  <?php

                    $arr = [ //设置一个二维数组

                            ['id'=>1,'title'=>'产品1','url'=>'./img/images/l3_05.jpg'],

                            ['id'=>2,'title'=>'产品2','url'=>'./img/images/img-wrap2_03.jpg'],

                            ['id'=>3,'title'=>'产品3','url'=>'./img/images/img-wrap3_03.jpg'],

                            ['id'=>4,'title'=>'产品4','url'=>'./img/images/img-wrap4_03.jpg'],

                            ['id'=>5,'title'=>'产品5','url'=>'./img/images/img-wrap5_03.jpg'],

                            ['id'=>6,'title'=>'产品6','url'=>'./img/images/img-wrap6_03.jpg']

                        ]

                ?>

                <?php

                foreach($arr as $aa){  //遍历二维数组  $aa是随便定义的

                    ?>

                    <li>

                        <a href="ylcp.php?id=<?php echo $aa['id']?>"> //这个a标签是跳转ylcp.php?id=<?php echo $aa['id'] 给地址栏添加这个后面的页面就可以根据这个来显示相应的内容

                            <img src="<?php echo $aa['url']?>" alt="">

                            <span><?php echo $aa['title']?></span>

                         </a>

                    </li>

                    <?php

                }

                ?>

--------------------------------------------------------------跳转的页面----------------------------------

<?php

if(isset($_GET['id'])){    //判断有没有这个值 如果有就把他赋给了这个$id 

    $id = $_GET['id'];     

}else{

    header(("location:/"));//如果没有就跳到相应的页面 /是根目录的意思

}

// $arr =[];

switch($id){   //判断上一个页面传过来的值是多少然后输出相应的数组

    case 1:

        $arr =['id'=>1,'title'=>'产品1','url'=>'./img/images/l3_05.jpg'];

    break;

    case 2:

        $arr =['id'=>2,'title'=>'产品2','url'=>'./img/images/img-wrap2_03.jpg'];

    break;

    case 3:

        $arr =['id'=>2,'title'=>'产品3','url'=>'./img/images/img-wrap3_03.jpg'];

    break;

    case 4:

        $arr =['id'=>1,'title'=>'产品4','url'=>'./img/images/img-wrap4_03.jpg'];

    break;

    case 5:

        $arr =['id'=>1,'title'=>'产品5','url'=>'./img/images/img-wrap5_03.jpg'];

    break;

    case 6:

        $arr =['id'=>1,'title'=>'产品6','url'=>'./img/images/img-wrap6_03.jpg'];

    break;

}

?>

  <div class="fl hs">

                        <img src="<?php echo $arr['url']?>" alt=""> //这个是接收的数组里面的图片地址

                        </div>  

                        <div class="fl sjhs">

                            <h2><?php echo $arr['title']?></h2> //接收的数组里面的名称

                        </div>