<?php
//生成随机码
function create_invite_code() {
    $code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $rand = $code[rand(0,25)]
        .strtoupper(dechex(date('m')))
        .date('d')
        .substr(time(),-5)
        .substr(microtime(),2,5)
        .sprintf('%02d',rand(0,99));
    for(
        $a = md5( $rand, true ),
        $s = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ',
        $d = '',
        $f = 0;
        $f < 6;
        $g = ord( $a[ $f ] ),
        $d .= $s[ ( $g ^ ord( $a[ $f + 8 ] ) ) - $g & 0x1F ],
        $f++
    );
    return $d;
}

function create_order_number()
{
    return date('YmdHis') . str_pad(mt_rand(1, 999999), 6, '0', STR_PAD_LEFT);
}

/**
 * curl 请求
 * @param $url
 * @param null $header
 * @param null $data
 * @return mixed
 */
function curlRequest($url, $header = null, $data = null)
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_ENCODING, 'gzip');
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    if ($data) {
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    }
    if ($header) {
        curl_setopt($ch, CURLOPT_HEADER, $header);
    }
    $ret = curl_exec($ch);
    curl_close($ch);

    return $ret;
}

/**
 * 时间格式化（时间戳）
 * @param $ptime
 * @return false|string
 */
function uc_time_ago($ptime)
{
    date_default_timezone_set('PRC');
    $etime = time() - $ptime;
    switch ($etime) {
        case $etime <= 60:
            $msg = '刚刚';
            break;
        case $etime > 60 && $etime <= 60 * 60:
            $msg = floor($etime / 60) . ' 分钟前';
            break;
        case $etime > 60 * 60 && $etime <= 24 * 60 * 60:
            $msg = date('Ymd', $ptime) == date('Ymd', time()) ? '今天 ' . date('H:i', $ptime) : '昨天 ' . date('H:i', $ptime);
            break;
        case $etime > 24 * 60 * 60 && $etime <= 2 * 24 * 60 * 60:
            $msg = date('Ymd', $ptime) + 1 == date('Ymd', time()) ? '昨天 ' . date('H:i', $ptime) : '前天 ' . date('H:i', $ptime);
            break;
        case $etime > 2 * 24 * 60 * 60 && $etime <= 12 * 30 * 24 * 60 * 60:
            $msg = date('Y', $ptime) == date('Y', time()) ? date('m-d H:i', $ptime) : date('Y-m-d H:i', $ptime);
            break;
        default:
            $msg = date('Y-m-d H:i', $ptime);
    }
    return $msg;
}

/**
 * 根据生日计算年龄
 * @param $birthday  1999-02-01
 * @return int|string   21
 */
function birthday($birthday){
    list($year,$month,$day) = explode("-",$birthday);
    $year_diff = date("Y") - $year;
    $month_diff = date("m") - $month;
    $day_diff  = date("d") - $day;
    if ($day_diff < 0 || $month_diff < 0)
        $year_diff--;
    return $year_diff;
}