<?php
// 应用公共文件


/**
 * 随机码
 * @param type $length
 * @return string
 */
function randString($length, $c = false) {
    if ($c) {
        $_codeSet = '0123456789';
    } else {
        $_codeSet = '2345678abcdefhijkmnpqrstuvwxyzABCDEFGHJKLMNPQRTUVWXY';
    }
    $code = '';
    for ($i = 0; $i < $length; $i++) {
        $code.= $_codeSet[mt_rand(0, strlen($_codeSet) - 1)];
    }
    return $code;
}

/**
 * openssl aes 加密
 * @param $data
 * @param $key
 * @param int $options
 * @return string
 */
function crypto_encrypt($data, $key, $options = \OPENSSL_RAW_DATA) {
    $key = md5($key);
    $iv = substr($key, 0, -16);
    $encrypted = openssl_encrypt($data, 'aes-256-cbc', $key, $options, $iv);
    return $encrypted;
}

/**
 * openssl aes 解密
 * @param $data
 * @param $key
 * @param int $options
 * @return string
 */
function crypto_decrypt($data, $key, $options = \OPENSSL_RAW_DATA) {
    $key = md5($key);
    $iv = substr($key, 0, -16);
    return openssl_decrypt($data, 'aes-256-cbc', $key, $options, $iv);
}


/**
 * 验证手机号是否正确
 * @author honfei
 * @param number $mobile
 */
function isMobile($mobile) {
    if (!is_numeric($mobile)) {
        return false;
    }
    return preg_match('/^1[23456789]{1}\d{9}$/', $mobile) ? true : false;
}

/**
 * 设置网址参数
 * @param $url
 */
function setParam($url,$parm){
    $url = explode('?',$url);
    $web = $url[0];
    $parmAr = [];
    $parmStr = count($url) == 2 ? $url[1] : "" ;
    if(!empty($parmStr)) {
        parse_str($parmStr,$parmAr);
    }
    foreach ($parm as $k=>$v){
        $parmAr[$k] = $v;
    }
    $parmStr2 = http_build_query($parmAr);
    return $web .( empty($parmStr2) ? "" : ("?" . $parmStr2));
}


/**
 * 几天未消费
 * @param $time
 */
function getLastTime($time) {
    $nowTime = time();
    $day = 3600 * 24;

    if(empty($time)) {
        return '从无消费';
    }

    if($nowTime - $time < $day) {
        return '今天有消费';
    }
    $lDay = intval(($nowTime - $time) / $day);

    return ($lDay + 1).'天未消费';
}