haxianhe

<?php
    /*
     * 查找数组中上一个元素键/值，下一个元素键/值
     * @param   str     $currentValue   当前元素的值
     * @param   array   $array          待查询数组
     * @return  array   上一个元素键/值，下一个元素键/值
     */
    public function arrayPrevNext($currentValue, $array)
    {
        $prev_key = $next_key = null;

haxianhe

<?php
    $data[] = array('volume' => 67, 'edition' => 2);
    $data[] = array('volume' => 86, 'edition' => 1);
    $data[] = array('volume' => 85, 'edition' => 6);
    $data[] = array('volume' => 98, 'edition' => 2);
    $data[] = array('volume' => 86, 'edition' => 6);
    $data[] = array('volume' => 67, 'edition' => 7);
    print_r($data);
    $column = array_column($data, 'edition');
    array_multisort($column, SORT_DESC, $data);

haxianhe

<?php
/**
 *============================
 * author:Farmer
 * time:2017/12/19
 * blog:blog.icodef.com
 * function:加密方式
 *============================
 */