<?php
$arr = ['abc',1,2,3,'sf','tiaodao','name'=>'sp','fuwang'];//数组定义，跟js类似，还可以定义关联数组，
$arr['sex'] = 1;//给数组添加关联数组，关联数组不计入数组元素的下标，但是算在元素个数中
$a = count($arr);//数组的元素个数
foreach($arr as $k=>$val){//因为数组最后元素的下标与元素个数不同，普通for循环无法打印php数组，这里采用foreach
echo$k.'=>'.$val."<br>";
}
echo $arr['sex'];
?>
<?php
if(isset($_GET['id'])){
$id = $_GET['id'];//可以获取id时，页面跳转到此id页面
}else{
header("location:/");//无法获取时跳转到根目录
}
switch($id){
case 1:
$arr=["id"=>1,"title"=>'产品1',"imgurl"=>'./images/产品名称图片.png'];
break;
case 2:
$arr=["id"=>2,"title"=>'产品2',"imgurl"=>'./images/1.2.png'];
break;
case 3:
$arr=["id"=>3,"title"=>'产品3',"imgurl"=>'./images/1.3.png'];
break;
case 4:
$arr=["id"=>4,"title"=>'产品4',"imgurl"=>'./images/1.4.png'];
break;
case 5:
$arr=["id"=>5,"title"=>'产品5',"imgurl"=>'./images/1.5.png'];
break;
case 6:
$arr=["id"=>6,"title"=>'产品6',"imgurl"=>'./images/1.6.png'];
break;
}
?>
运用关联数组和多维数组控制页面的跳转