PHP如何高效地对根据键值对数组元素进行归类?
本文介绍了PHP如何高效地对根据键值对数组元素进行归类?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
问 题
如以下代码:
$arr = [
0 => [
"category" => "red",
"price" => 95
],
1 => [
"category" => "blue",
"price" => 85
],
2 => [
"category" => "red",
"price" => 75
]
];
//我希望将以上其归类为如下数组
[
"red" => [
0 => [
"category" => "red",
"price" => 95
],
1 => [
"category" => "red",
"price" => 75
]
],
"blue" => [
0 => [
"category" => "blue",
"price" => 85
]
]
]
希望大神能给个思路,谢谢
解决方案
<?php
$arr = [
0 => [
"category" => "red",
"price" => 95
],
1 => [
"category" => "blue",
"price" => 85
],
2 => [
"category" => "red",
"price" => 75
]
];
$result = array();
foreach($arr as $k=>$v){
//var_dump($v);
//echo $v['price'];
$key = $v['category'];
if(!array_key_exists($key, $result)) $result[$key] =array();
$result[$key][] = $v;
}
var_dump($result);
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