zc10000/application/common.php

<?php
// +----------------------------------------------------------------------
// | Yzncms [ 御宅男工作室 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2018 http://yzncms.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 御宅男 <530765310@qq.com>
// +----------------------------------------------------------------------

// +----------------------------------------------------------------------
// | 全局函数文件
// +----------------------------------------------------------------------
use think\Db;
use think\facade\Cache;
use think\facade\Config;
use think\facade\Request;

!defined('DS') && define('DS', DIRECTORY_SEPARATOR);
// 运行目录
define('ROOT_URL', Request::rootUrl() . '/');
//模板目录
define('TEMPLATE_PATH', ROOT_PATH . 'templates' . DS);
//强制隐藏index.php
Url::root('/');

// Form别名
if (!class_exists('Form')) {
    class_alias('form\\Form', 'Form');
}
// 加载用户函数文件
include_once APP_PATH . 'function.php';

/**
 * 系统缓存缓存管理
 * cache('model')        获取model缓存
 * cache('model',null)   删除model缓存
 * @param mixed $name    缓存名称
 * @param mixed $value   缓存值
 * @param mixed $options 缓存参数
 * @return mixed
 */
function cache($name, $value = '', $options = null)
{
    static $cache = '';
    if (empty($cache)) {
        $cache = \libs\Cache_factory::instance();
    }
    // 获取缓存
    if ('' === $value) {
        if (false !== strpos($name, '.')) {
            $vars = explode('.', $name);
            $data = $cache->get($vars[0]);
            return is_array($data) ? $data[$vars[1]] : $data;
        } else {
            return $cache->get($name);
        }
    } elseif (is_null($value)) {
        //删除缓存
        return $cache->remove($name);
    } else {
        //缓存数据
        if (is_array($options)) {
            $expire = isset($options['expire']) ? $options['expire'] : null;
        } else {
            $expire = is_numeric($options) ? $options : null;
        }
        return $cache->set($name, $value, $expire);
    }
}

/**
 * 获取上传资源的CDN的地址
 * @param string  $url    资源相对地址
 * @param boolean $domain 是否显示域名 或者直接传入域名
 * @return string
 */
function cdnurl($url, $domain = false)
{
    $regex  = "/^((?:[a-z]+:)?\/\/|data:image\/)(.*)/i";
    $cdnurl = Config::get('cdnurl');
    if (is_bool($domain) || stripos($cdnurl, '/') === 0) {
        $url = preg_match($regex, $url) || ($cdnurl && stripos($url, $cdnurl) === 0) ? $url : $cdnurl . $url;
    }
    if ($domain && !preg_match($regex, $url)) {
        $domain = is_bool($domain) ? Request::domain() : $domain;
        $url    = $domain . $url;
    }
    return $url;
}

/**
 * select返回的数组进行整数映射转换
 *
 * @param array $map  映射关系二维数组  array(
 *                                          '字段名1'=>array(映射关系数组),
 *                                          '字段名2'=>array(映射关系数组),
 *                                           ......
 *                                       )
 * @author 朱亚杰 <zhuyajie@topthink.net>
 * @return array
 *
 *  array(
 *      array('id'=>1,'title'=>'标题','status'=>'1','status_text'=>'正常')
 *      ....
 *  )
 *
 */
function int_to_string(&$data, $map = ['status' => [1 => '正常', -1 => '删除', 0 => '禁用', 2 => '未审核', 3 => '草稿']])
{
    if ($data === false || $data === null) {
        return $data;
    }
    $data = (array) $data;
    foreach ($data as $key => $row) {
        foreach ($map as $col => $pair) {
            if (isset($row[$col]) && isset($pair[$row[$col]])) {
                $data[$key][$col . '_text'] = $pair[$row[$col]];
            }
        }
    }
    return $data;
}

/**
 * 字符串转换为数组，主要用于把分隔符调整到第二个参数
 * @param  string $str  要分割的字符串
 * @param  string $glue 分割符
 * @return array
 */
function str2arr($str, $glue = ',')
{
    return explode($glue, $str);
}

/**
 * 数组转换为字符串，主要用于把分隔符调整到第二个参数
 * @param  array  $arr  要连接的数组
 * @param  string $glue 分割符
 * @return string
 */
function arr2str($arr, $glue = ',')
{
    if (is_string($arr)) {
        return $arr;
    }
    return implode($glue, $arr);
}

/**
 * 字符截取
 * @param $string 需要截取的字符串
 * @param $length 长度
 * @param $dot
 */
function str_cut($sourcestr, $length, $dot = '...')
{
    $returnstr  = '';
    $i          = 0;
    $n          = 0;
    $str_length = strlen($sourcestr); //字符串的字节数
    while (($n < $length) && ($i <= $str_length)) {
        $temp_str = substr($sourcestr, $i, 1);
        $ascnum   = Ord($temp_str); //得到字符串中第$i位字符的ascii码
        if ($ascnum >= 224) { //如果ASCII位高与224，
            $returnstr = $returnstr . substr($sourcestr, $i, 3); //根据UTF-8编码规范，将3个连续的字符计为单个字符
            $i         = $i + 3; //实际Byte计为3
            $n++; //字串长度计1
        } elseif ($ascnum >= 192) { //如果ASCII位高与192，
            $returnstr = $returnstr . substr($sourcestr, $i, 2); //根据UTF-8编码规范，将2个连续的字符计为单个字符
            $i         = $i + 2; //实际Byte计为2
            $n++; //字串长度计1
        } elseif ($ascnum >= 65 && $ascnum <= 90) {
            //如果是大写字母，
            $returnstr = $returnstr . substr($sourcestr, $i, 1);
            $i         = $i + 1; //实际的Byte数仍计1个
            $n++; //但考虑整体美观，大写字母计成一个高位字符
        } else {
            //其他情况下，包括小写字母和半角标点符号，
            $returnstr = $returnstr . substr($sourcestr, $i, 1);
            $i         = $i + 1; //实际的Byte数计1个
            $n         = $n + 0.5; //小写字母和半角标点等与半个高位字符宽...
        }
    }
    if ($str_length > strlen($returnstr)) {
        $returnstr = $returnstr . $dot; //超过长度时在尾处加上省略号
    }
    return $returnstr;
}

/**
 * 对查询结果集进行排序
 * @access public
 * @param array $list   查询结果
 * @param string $field 排序的字段名
 * @param array $sortby 排序类型
 * asc正向排序 desc逆向排序 nat自然排序
 * @return array
 */
function list_sort_by($list, $field, $sortby = 'asc')
{
    if (is_array($list)) {
        $refer = $resultSet = [];
        foreach ($list as $i => $data) {
            $refer[$i] = &$data[$field];
        }

        switch ($sortby) {
            case 'asc': // 正向排序
                asort($refer);
                break;
            case 'desc': // 逆向排序
                arsort($refer);
                break;
            case 'nat': // 自然排序
                natcasesort($refer);
                break;
        }
        foreach ($refer as $key => $val) {
            $resultSet[] = &$list[$key];
        }

        return $resultSet;
    }
    return false;
}

/**
 * 把返回的数据集转换成Tree
 * @param array $list   要转换的数据集
 * @param string $pid   parent标记字段
 * @param string $level level标记字段
 * @return array
 * @author 麦当苗儿 <zuojiazi@vip.qq.com>
 */
function list_to_tree($list, $pk = 'id', $pid = 'parentid', $child = '_child', $root = 0)
{
    // 创建Tree
    $tree = [];
    if (is_array($list)) {
        // 创建基于主键的数组引用
        $refer = [];
        foreach ($list as $key => $data) {
            $refer[$data[$pk]] = &$list[$key];
        }
        foreach ($list as $key => $data) {
            // 判断是否存在parent
            $parentId = $data[$pid];
            if ($root == $parentId) {
                $tree[] = &$list[$key];
            } else {
                if (isset($refer[$parentId])) {
                    $parent           = &$refer[$parentId];
                    $parent[$child][] = &$list[$key];
                }
            }
        }
    }
    return $tree;
}

/**
 * 解析配置
 * @param string $value 配置值
 * @return array|string
 */
function parse_attr($value = '')
{
    $array = preg_split('/[,;\r\n]+/', trim($value, ",;\r\n"));
    if (strpos($value, ':')) {
        $value = [];
        foreach ($array as $val) {
            list($k, $v) = explode(':', $val);
            $value[$k]   = $v;
        }
    } else {
        $value = $array;
    }
    return $value;
}

/**
 * 时间戳格式化
 * @param int $timestamp
 * @return string 完整的时间显示
 */
function time_format($timestamp = null, $type = 0)
{
    if ($timestamp == 0) {
        return '';
    }
    $types     = ['Y-m-d H:i:s', 'Y-m-d H:i', 'Y-m-d'];
    $timestamp = $timestamp === null ? $_SERVER['REQUEST_TIME'] : intval($timestamp);
    return date($types[$type], $timestamp);
}

/**
 * 获取语义化时间
 * @param int $time  时间
 * @param int $local 本地时间
 * @return string
 */
function human_date($time, $local = null)
{
    return \util\Date::human($time, $local);
}

/**
 * 格式化字节大小
 * @param  number $size      字节数
 * @param  string $delimiter 数字和单位分隔符
 * @return string            格式化后的带单位的大小
 */
function format_bytes($size, $delimiter = '')
{
    $units = ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];
    for ($i = 0; $size >= 1024 && $i < 5; $i++) {
        $size /= 1024;
    }
    return round($size, 2) . $delimiter . $units[$i];
}

/**
 * 根据PHP各种类型变量生成唯一标识号
 * @param mixed $mix 变量
 * @return string
 */
function to_guid_string($mix)
{
    if (is_object($mix)) {
        return spl_object_hash($mix);
    } elseif (is_resource($mix)) {
        $mix = get_resource_type($mix) . strval($mix);
    } else {
        $mix = serialize($mix);
    }
    return md5($mix);
}

/**
 * 对用户的密码进行加密
 * @param $password
 * @param $encrypt //传入加密串，在修改密码时做认证
 * @return array/password
 */
function encrypt_password($password, $encrypt = '')
{
    $pwd             = [];
    $pwd['encrypt']  = $encrypt ? $encrypt : genRandomString();
    $pwd['password'] = md5(trim($password) . $pwd['encrypt']);
    return $encrypt ? $pwd['password'] : $pwd;
}

/**
 * 产生一个指定长度的随机字符串,并返回给用户
 * @param type $len 产生字符串的长度
 * @return string   随机字符串
 */
function genRandomString($len = 6)
{
    $chars = [
        "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
        "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
        "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
        "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
        "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
        "3", "4", "5", "6", "7", "8", "9",
    ];
    $charsLen = count($chars) - 1;
    // 将数组打乱
    shuffle($chars);
    $output = "";
    for ($i = 0; $i < $len; $i++) {
        $output .= $chars[mt_rand(0, $charsLen)];
    }
    return $output;
}

/**
 * 获取模型数据
 * @param type $modelid 模型ID
 * @param type $name 返回的字段，默认返回全部，数组
 * @return boolean
 */
function getModel($modelid, $name = '')
{
    if (empty($modelid) || !is_numeric($modelid)) {
        return false;
    }
    $key = 'getModel_' . $modelid;
    /* 读取缓存数据 */
    $cache = Cache::get($key);
    if ($cache === 'false') {
        return false;
    }
    if (empty($cache)) {
        //读取数据
        $cache = Db::name('Model')->where(['id' => $modelid])->find();
        if (empty($cache)) {
            Cache::set($key, 'false', 60);
            return false;
        } else {
            Cache::set($key, $cache, 3600);
        }
    }
    return is_null($name) ? $cache : $cache[$name];
}

/**
 * 生成缩略图
 * @param type $imgurl    图片地址
 * @param type $width     缩略图宽度
 * @param type $height    缩略图高度
 * @param type $thumbType 缩略图生成方式
 * @param type $smallpic  图片不存在时显示默认图片
 * @return type
 */
function thumb($imgurl, $width = 100, $height = 100, $thumbType = 1, $smallpic = 'noimage.jpg')
{
    static $_thumb_cache = [];
    $smallpic            = Config::get('public_url') . 'static/common/img/' . $smallpic;
    if (empty($imgurl)) {
        return $smallpic;
    }
    //区分
    $key = md5($imgurl . $width . $height . $thumbType . $smallpic);
    if (isset($_thumb_cache[$key])) {
        return $_thumb_cache[$key];
    }
    if (!$width) {
        return $smallpic;
    }

    $uploadUrl = cdnurl(Config::get('public_url')) . 'uploads/';

    $imgurl_replace = str_replace($uploadUrl, '', $imgurl);

    $newimgname = 'thumb_' . $width . '_' . $height . '_' . basename($imgurl_replace);
    $newimgurl  = dirname($imgurl_replace) . '/' . $newimgname;
    //检查生成的缩略图是否已经生成过
    if (is_file(ROOT_PATH . 'public' . DS . 'uploads' . DS . $newimgurl)) {
        return $uploadUrl . $newimgurl;
    }
    //检查文件是否存在，如果是开启远程附件的，估计就通过不了，以后在考虑完善！
    if (!is_file(ROOT_PATH . 'public' . DS . 'uploads' . DS . $imgurl_replace)) {
        return $imgurl;
    }
    //取得图片相关信息
    list($width_t, $height_t, $type, $attr) = getimagesize(ROOT_PATH . 'public' . DS . 'uploads' . DS . $imgurl_replace);
    //如果高是0，自动计算高
    if ($height <= 0) {
        $height = round(($width / $width_t) * $height_t);
    }
    //判断生成的缩略图大小是否正常
    if ($width >= $width_t || $height >= $height_t) {
        return $imgurl;
    }
    model('Attachment')->create_thumb(ROOT_PATH . 'public' . DS . 'uploads' . DS . $imgurl_replace, ROOT_PATH . 'public' . DS . 'uploads' . DS . dirname($imgurl_replace) . '/', $newimgname, "{$width},{$height}", $thumbType);
    $_thumb_cache[$key] = $uploadUrl . $newimgurl;
    return $_thumb_cache[$key];

}

/**
 * 下载远程文件，默认保存在temp下
 * @param  string  $url      网址
 * @param  string  $filename 保存文件名
 * @param  integer $timeout  过期时间
 * @param  bool $repalce     是否覆盖已存在文件
 * @return string            本地文件名
 */
function http_down($url, $filename = "", $timeout = 60)
{
    if (empty($filename)) {
        $filename = ROOT_PATH . 'public' . DS . 'temp' . DS . pathinfo($url, PATHINFO_BASENAME);
    }
    $path = dirname($filename);
    if (!is_dir($path) && !mkdir($path, 0755, true)) {
        return false;
    }
    $url = str_replace(" ", "%20", $url);
    if (function_exists('curl_init')) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        // curl_setopt($ch, CURLOPT_MAXREDIRS, 2);
        // curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        if ('https' == substr($url, 0, 5)) {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        }
        $temp = curl_exec($ch);
        if (file_put_contents($filename, $temp) && !curl_error($ch)) {
            return $filename;
        } else {
            return false;
        }
    } else {
        $opts = [
            "http" => [
                "method"  => "GET",
                "header"  => "",
                "timeout" => $timeout,
            ],
        ];
        $context = stream_context_create($opts);
        if (@copy($url, $filename, $context)) {
            //$http_response_header
            return $filename;
        } else {
            return false;
        }
    }
}

/**
 * 安全过滤函数
 * @param $string
 * @return string
 */
function safe_replace($string)
{
    $string = str_replace('%20', '', $string);
    $string = str_replace('%27', '', $string);
    $string = str_replace('%2527', '', $string);
    $string = str_replace('*', '', $string);
    $string = str_replace('"', '&quot;', $string);
    $string = str_replace("'", '', $string);
    $string = str_replace('"', '', $string);
    $string = str_replace(';', '', $string);
    $string = str_replace('<', '&lt;', $string);
    $string = str_replace('>', '&gt;', $string);
    $string = str_replace("{", '', $string);
    $string = str_replace('}', '', $string);
    $string = str_replace('\\', '', $string);
    return $string;
}

/**
 * 字符串加密、解密函数
 * @param    string    $txt        字符串
 * @param    string    $operation  ENCODE为加密，DECODE为解密，可选参数，默认为ENCODE，
 * @param    string    $key        密钥：数字、字母、下划线
 * @param    string    $expiry     过期时间
 * @return    string
 */
function sys_auth($string, $operation = 'ENCODE', $key = '', $expiry = 0)
{
    $ckey_length = 4;
    $key         = md5($key != '' ? $key : Config::get('data_auth_key'));
    $keya        = md5(substr($key, 0, 16));
    $keyb        = md5(substr($key, 16, 16));
    $keyc        = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length) : substr(md5(microtime()), -$ckey_length)) : '';

    $cryptkey   = $keya . md5($keya . $keyc);
    $key_length = strlen($cryptkey);

    $string        = $operation == 'DECODE' ? base64_decode(strtr(substr($string, $ckey_length), '-_', '+/')) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keyb), 0, 16) . $string;
    $string_length = strlen($string);

    $result = '';
    $box    = range(0, 255);

    $rndkey = [];
    for ($i = 0; $i <= 255; $i++) {
        $rndkey[$i] = ord($cryptkey[$i % $key_length]);
    }

    for ($j = $i = 0; $i < 256; $i++) {
        $j       = ($j + $box[$i] + $rndkey[$i]) % 256;
        $tmp     = $box[$i];
        $box[$i] = $box[$j];
        $box[$j] = $tmp;
    }

    for ($a = $j = $i = 0; $i < $string_length; $i++) {
        $a       = ($a + 1) % 256;
        $j       = ($j + $box[$a]) % 256;
        $tmp     = $box[$a];
        $box[$a] = $box[$j];
        $box[$j] = $tmp;
        $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
    }

    if ($operation == 'DECODE') {
        if ((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26) . $keyb), 0, 16)) {
            return substr($result, 26);
        } else {
            return '';
        }
    } else {
        return $keyc . rtrim(strtr(base64_encode($result), '+/', '-_'), '=');
    }
}

function hsv2rgb($h, $s, $v)
{
    $r = $g = $b = 0;

    $i = floor($h * 6);
    $f = $h * 6 - $i;
    $p = $v * (1 - $s);
    $q = $v * (1 - $f * $s);
    $t = $v * (1 - (1 - $f) * $s);

    switch ($i % 6) {
        case 0:
            $r = $v;
            $g = $t;
            $b = $p;
            break;
        case 1:
            $r = $q;
            $g = $v;
            $b = $p;
            break;
        case 2:
            $r = $p;
            $g = $v;
            $b = $t;
            break;
        case 3:
            $r = $p;
            $g = $q;
            $b = $v;
            break;
        case 4:
            $r = $t;
            $g = $p;
            $b = $v;
            break;
        case 5:
            $r = $v;
            $g = $p;
            $b = $q;
            break;
    }

    return [
        floor($r * 255),
        floor($g * 255),
        floor($b * 255),
    ];
}

/**
 * 首字母头像
 * @param $text
 * @return string
 */
function letter_avatar($text)
{
    $total           = unpack('L', hash('adler32', $text, true))[1];
    $hue             = $total % 360;
    list($r, $g, $b) = hsv2rgb($hue / 360, 0.3, 0.9);

    $bg    = "rgb({$r},{$g},{$b})";
    $color = "#ffffff";
    $first = mb_strtoupper(mb_substr($text, 0, 1));
    $src   = base64_encode('<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="100" width="100"><rect fill="' . $bg . '" x="0" y="0" width="100" height="100"></rect><text x="50" y="50" font-size="50" text-copy="fast" fill="' . $color . '" text-anchor="middle" text-rights="admin" alignment-baseline="central">' . $first . '</text></svg>');
    $value = 'data:image/svg+xml;base64,' . $src;
    return $value;
}

/**
 * 生成文件后缀图片
 * @param string $suffix 后缀
 * @param null   $background
 * @return string
 */
function build_suffix_image($suffix, $background = null)
{
    $suffix          = mb_substr(strtoupper($suffix), 0, 4);
    $total           = unpack('L', hash('adler32', $suffix, true))[1];
    $hue             = $total % 360;
    list($r, $g, $b) = hsv2rgb($hue / 360, 0.3, 0.9);

    $background = $background ? $background : "rgb({$r},{$g},{$b})";

    $icon = <<<EOT
        <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
            <path style="fill:#E2E5E7;" d="M128,0c-17.6,0-32,14.4-32,32v448c0,17.6,14.4,32,32,32h320c17.6,0,32-14.4,32-32V128L352,0H128z"/>
            <path style="fill:#B0B7BD;" d="M384,128h96L352,0v96C352,113.6,366.4,128,384,128z"/>
            <polygon style="fill:#CAD1D8;" points="480,224 384,128 480,128 "/>
            <path style="fill:{$background};" d="M416,416c0,8.8-7.2,16-16,16H48c-8.8,0-16-7.2-16-16V256c0-8.8,7.2-16,16-16h352c8.8,0,16,7.2,16,16 V416z"/>
            <path style="fill:#CAD1D8;" d="M400,432H96v16h304c8.8,0,16-7.2,16-16v-16C416,424.8,408.8,432,400,432z"/>
            <g><text><tspan x="220" y="380" font-size="124" font-family="Verdana, Helvetica, Arial, sans-serif" fill="white" text-anchor="middle">{$suffix}</tspan></text></g>
        </svg>
EOT;
    return $icon;
}

/**
 * 跨域检测
 */
function check_cors_request()
{
    //跨域访问的时候才会存在此字段
    if (isset($_SERVER['HTTP_ORIGIN']) && $_SERVER['HTTP_ORIGIN']) {
        $info        = parse_url($_SERVER['HTTP_ORIGIN']);
        $domainArr   = explode(',', Config::get('cors_request_domain'));
        $domainArr[] = Request::host(true);
        if (in_array("*", $domainArr) || in_array($_SERVER['HTTP_ORIGIN'], $domainArr) || (isset($info['host']) && in_array($info['host'], $domainArr))) {
            header("Access-Control-Allow-Origin: " . $_SERVER['HTTP_ORIGIN']);
        } else {
            header('HTTP/1.1 403 Forbidden');
            exit;
        }
        header('Access-Control-Allow-Credentials: true');
        header('Access-Control-Max-Age: 86400');
        if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
            if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD'])) {
                header("Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS");
            }
            if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'])) {
                header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");
            }
            exit;
        }
    }
}

/**
 * 清理XSS
 */
function xss_clean($content, $is_image = false)
{
    return \app\common\library\Security::instance()->xss_clean($content, $is_image);
}

/**
 * 清理URL
 */
function url_clean($url)
{
    if (!check_url_allowed($url)) {
        return '';
    }
    return xss_clean($url);
}

/**
 * 检测URL是否允许范围内
 * @param string $url URL
 * @return bool
 */
function check_url_allowed($url = '')
{
    //允许的主机列表
    $allowedHostArr = [
        strtolower(request()->host())
    ];

    if (empty($url)) {
        return true;
    }

    //如果是站内相对链接则允许
    if (preg_match("/^[\/a-z][a-z0-9][a-z0-9\.\/]+((\?|#).*)?\$/i", $url) && substr($url, 0, 2) !== '//') {
        return true;
    }

    //如果是站外链接则需要判断HOST是否允许
    if (preg_match("/((http[s]?:\/\/)+(?>[a-z\-0-9]{2,}\.){1,}[a-z]{2,8})(?:\s|\/)/i", $url)) {
        $chkHost = parse_url(strtolower($url), PHP_URL_HOST);
        if ($chkHost && in_array($chkHost, $allowedHostArr)) {
            return true;
        }
    }

    return false;
}

/**
 * 使用短标签打印或返回数组结构
 * @param mixed   $data
 * @param boolean $return 是否返回数据
 * @return string
 */
function var_export_short($data, $return = true)
{
    return var_export($data, $return);
    $replaced = [];
    $count    = 0;

    //判断是否是对象
    if (is_resource($data) || is_object($data)) {
        return var_export($data, $return);
    }

    //判断是否有特殊的键名
    $specialKey = false;
    array_walk_recursive($data, function (&$value, &$key) use (&$specialKey) {
        if (is_string($key) && (stripos($key, "\n") !== false || stripos($key, "array (") !== false)) {
            $specialKey = true;
        }
    });
    if ($specialKey) {
        return var_export($data, $return);
    }
    array_walk_recursive($data, function (&$value, &$key) use (&$replaced, &$count, &$stringcheck) {
        if (is_object($value) || is_resource($value)) {
            $replaced[$count] = var_export($value, true);
            $value            = "##<{$count}>##";
        } else {
            if (is_string($value) && (stripos($value, "\n") !== false || stripos($value, "array (") !== false)) {
                $index = array_search($value, $replaced);
                if ($index === false) {
                    $replaced[$count] = var_export($value, true);
                    $value            = "##<{$count}>##";
                } else {
                    $value = "##<{$index}>##";
                }
            }
        }
        $count++;
    });

    $dump = var_export($data, true);

    $dump = preg_replace('#(?:\A|\n)([ ]*)array \(#i', '[', $dump); // Starts
    $dump = preg_replace('#\n([ ]*)\),#', "\n$1],", $dump); // Ends
    $dump = preg_replace('#=> \[\n\s+\],\n#', "=> [],\n", $dump); // Empties
    $dump = preg_replace('#\)$#', "]", $dump); //End

    if ($replaced) {
        $dump = preg_replace_callback("/'##<(\d+)>##'/", function ($matches) use ($replaced) {
            return isset($replaced[$matches[1]]) ? $replaced[$matches[1]] : "''";
        }, $dump);
    }

    if ($return === true) {
        return $dump;
    } else {
        echo $dump;
    }
}