Question

PHP多维数组

这种数组怎么去遍历它？

Answer 1

查询出来的数组就是

$a = array(array(1,"苹果",1,"5元"),array(1,"苹果",1,"5元"),array(1,"苹果",1,"5元"));
$b = array(array(1,"白菜",2,"3元"),array(1,"白菜",2,"3元"));

分别查询 $a 和 $b 后，用 $data = array('水果'=>$a,'蔬菜'=>$b) 就可以实现

Answer 2

<?php
$arr = ['a','b',['c','d']];
foreach($arr as $i){
if(is_array($i)){
foreach($i as $j){
echo $j;
}
} else {
echo $i;
}
}
用is_array()函数判断当前从数组中取到的元素是不是数组，如果是数组，就再加一层循环