php二维数组根据某两字段比较大小,重新自定义排序

 php数组函数array_push()、array_pop()、array_shift() 、array_unshift()简单用法示例：

<?php
/**
 * array_push()将一个或多个单元压入数组的末尾(入栈)
 */
$stack = ['a', 'b'];
array_push($stack, 'cc', 'dd', ['eee','fff']);
var_dump($stack);
//输出结果:['a','b','cc','dd',['eee','fff']]

/**
 * array_pop() 将数组最后一个单元弹出（出栈）
 */
$stack = ['a', 'b', 'c'];
array_pop($stack);
var_dump($stack);
//输出结果:['a','b']

/**
 * array_shift()将数组开头的单元移出数组
 */
$stack = ['a', 'b','c'];
array_shift($stack);
var_dump($stack);
//输出结果:['b', 'c'];

/**
 * array_unshift()在数组开头插入一个或多个单元 
 */
$stack = ['a', 'b'];
array_unshift($stack, 'cc', 'dd', ['eee','fff']);
var_dump($stack);
//输出结果:['cc','dd',['eee','fff'],'a','b']

demo示例:  mysql查询二维多条数据(二维数组)，需要根据某两字段比较大小,重新再排序

<?php

$mysqlDatas = [
    ['id' => 1, 'goods' => 'milk','totalPrice' => '9','balance' => '10'],
    ['id' => 2, 'goods' => 'apple','totalPrice' => '15','balance' => '10'],
    ['id' => 3, 'goods' => 'banana','totalPrice' => '5','balance' => '10'],
    ['id' => 4, 'goods' => 'orange','totalPrice' => '19','balance' => '10'],
];


$datas = [];
foreach ($mysqlDatas as $data){
    //总价大于余额数据排序最前面
    if($data['totalPrice'] > $data['balance']){
        array_unshift($datas, $data);
    }else{
        array_push($datas, $data);
    }
}
var_dump($datas);

//输出结果：
// [
//     ['id' => 4, 'goods' => 'orange','totalPrice' => '19','balance' => '10'],
//     ['id' => 2, 'goods' => 'apple','totalPrice' => '15','balance' => '10'],
//     ['id' => 1, 'goods' => 'milk','totalPrice' => '9','balance' => '10'],
//     ['id' => 3, 'goods' => 'banana','totalPrice' => '5','balance' => '10'],
// ]