site/application/common.php

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 流年 <liu21st@gmail.com>
// +----------------------------------------------------------------------

// 应用公共文件

header('Content-Type:text/html;Charset=utf-8');



/**
 * 保存后台用户行为
 * @param string $remark 日志备注
 */
function insert_admin_log($remark)
{

        db('user_log')->insert([
            'user_id' => session('admin_auth.id'),
            'uname' => session('admin_auth.uname'),
            'useragent' => request()->server('HTTP_USER_AGENT'),
            'ip' => request()->ip(),
            'url' => request()->url(true),
            'method' => request()->method(),
            'type' => request()->type(),
            'param' => json_encode(request()->param()),
            'remark' => $remark,
            'create_time' => time(),
        ]);

}

/**
 * @param $str
 * @return string
 * 驼峰命名法转下划线风格
 */
function to_under_score($str)
{
    $array = array();
    for ($i = 0; $i < strlen($str); $i++) {
        if ($str[$i] == strtolower($str[$i])) {
            $array[] = $str[$i];
        } else {
            if ($i > 0) {
                $array[] = '-';//想转什么就可以自己设置
            }
            $array[] = strtolower($str[$i]);
        }
    }
    $result = implode('', $array);
    return $result;
}

/**
 * 获取用户真实 IP
 */
function getIP()
{
    static $realip;
    if (isset($_SERVER)){
        if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])){
            $realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
        } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
            $realip = $_SERVER["HTTP_CLIENT_IP"];
        } else {
            $realip = $_SERVER["REMOTE_ADDR"];
        }
    } else {
        if (getenv("HTTP_X_FORWARDED_FOR")){
            $realip = getenv("HTTP_X_FORWARDED_FOR");
        } else if (getenv("HTTP_CLIENT_IP")) {
            $realip = getenv("HTTP_CLIENT_IP");
        } else {
            $realip = getenv("REMOTE_ADDR");
        }
    }
    return $realip;
}




//获取城市所在天气情况
function tianqi($chengshi)
{
    $url = 'http://wthrcdn.etouch.cn/weather_mini?city='.urlencode($chengshi);
    $html = file_get_contents($url);
    $jsondata = gzdecode($html);
    $data=json_decode($jsondata,true);
    $arr=array();
    $arr['chengshi']=$data['data']['city'];
    $dangtian=$data['data']['forecast'][0];
    $arr['gaowen']= str_replace("高温 ",null,$dangtian['high']);
    $arr['diwen']= str_replace("低温 ",null,$dangtian['low']);
    $arr['tianqi']=$dangtian['type'];
    $arr['fengxiang'] = $dangtian['fengxiang'];
    $arr['time'] =date("Y-m-d H:i:s");
    return $arr;


}


/**
 * 检测管理员是否登录（防止用户重复登录）
 * @return integer 0/管理员ID
 */
function is_admin_login()
{
    $admin = session('admin_auth');
    if (empty($admin)) {
        return 0;
    } else {
        return session('admin_auth_sign') == data_auth_sign($admin) ? $admin['id'] : 0;
    }
}


/**
 * 数据签名认证
 * @param  array $data 被认证的数据
 * @return string       签名
 */
function data_auth_sign($data)
{
    // 数据类型检测
    if (!is_array($data)) {
        $data = (array)$data;
    }
    ksort($data); // 排序
    $code = http_build_query($data); // url编码并生成query字符串
    $sign = sha1($code); // 生成签名
    return $sign;
}