自己项目中PHP常用工具类大全分享

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 0)); $i ++) {
            if ($number = strpos ( str_pad ( decbin ( ord ( substr ( $string, $i, 1 ) ) ), 8, '0', STR_PAD_LEFT ), '0' )) {
                if ($length < 1.0) {
                    break;
                }
                $result .= substr ( $string, $i, $number );
                $length -= 1.0;
                $i += $number - 1;
            } else {
                $result .= substr ( $string, $i, 1 );
                $length -= 0.5;
            }
        }
        $result = htmlspecialchars ( $result, ENT_QUOTES, 'UTF-8' );
        if ($i < $strlen) {
            $result .= $etc;
        }
        return $result;
    }
    /**
     * 遍历文件夹
     * @param string $dir
     * @param boolean $all  true表示递归遍历
     * @return array
     */
    public static function scanfDir($dir='', $all = false, &$ret = array()){
        if ( false !== ($handle = opendir ( $dir ))) {
            while ( false !== ($file = readdir ( $handle )) ) {
                if (!in_array($file, array('.', '..', '.git', '.gitignore', '.svn', '.htaccess', '.buildpath','.project'))) {
                    $cur_path = $dir . '/' . $file;
                    if (is_dir ( $cur_path )) {
                        $ret['dirs'][] =$cur_path;
                        $all && self::scanfDir( $cur_path, $all, $ret);
                    } else {
                        $ret ['files'] [] = $cur_path;
                    }
                }
            }
            closedir ( $handle );
        }
        return $ret;
    }
    /**
     * 邮件发送
     * @param string $toemail
     * @param string $subject
     * @param string $message
     * @return boolean
     */
    public static function sendMail($toemail = '', $subject = '', $message = '') {
        $mailer = Yii::createComponent ( 'application.extensions.mailer.EMailer' );
        //邮件配置
        $mailer->SetLanguage('zh_cn');
        $mailer->Host = Yii::app()->params['emailHost']; //发送邮件服务器
        $mailer->Port = Yii::app()->params['emailPort']; //邮件端口
        $mailer->Timeout = Yii::app()->params['emailTimeout'];//邮件发送超时时间
        $mailer->ContentType = 'text/html';//设置html格式
        $mailer->SMTPAuth = true;
        $mailer->Username = Yii::app()->params['emailUserName'];
        $mailer->Password = Yii::app()->params['emailPassword'];
        $mailer->IsSMTP ();
        $mailer->From = $mailer->Username; // 发件人邮箱
        $mailer->FromName = Yii::app()->params['emailFormName']; // 发件人姓名
        $mailer->AddReplyTo ( $mailer->Username );
        $mailer->CharSet = 'UTF-8';
        // 添加邮件日志
        $modelMail = new MailLog ();
        $modelMail->accept = $toemail;
        $modelMail->subject = $subject;
        $modelMail->message = $message;
        $modelMail->send_status = 'waiting';
        $modelMail->save ();
        // 发送邮件
        $mailer->AddAddress ( $toemail );
        $mailer->Subject = $subject;
        $mailer->Body = $message;
        if ($mailer->Send () === true) {
            $modelMail->times = $modelMail->times + 1;
            $modelMail->send_status = 'success';
            $modelMail->save ();
            return true;
        } else {
            $error = $mailer->ErrorInfo;
            $modelMail->times = $modelMail->times + 1;
            $modelMail->send_status = 'failed';
            $modelMail->error = $error;
            $modelMail->save ();
            return false;
        }
    }
    /**
     * 判断字符串是utf-8 还是gb2312
     * @param unknown $str
     * @param string $default
     * @return string
     */
    public static function utf8_gb2312($str, $default = 'gb2312')
    {
        $str = preg_replace("/[\x01-\x7F]+/", "", $str);
        if (empty($str)) return $default;
        $preg =  array(
            "gb2312" => "/^([\xA1-\xF7][\xA0-\xFE])+$/", //正则判断是否是gb2312
            "utf-8" => "/^[\x{4E00}-\x{9FA5}]+$/u",      //正则判断是否是汉字(utf8编码的条件了),这个范围实际上已经包含了繁体中文字了
        );
        if ($default == 'gb2312') {
            $option = 'utf-8';
        } else {
            $option = 'gb2312';
        }
        if (!preg_match($preg[$default], $str)) {
            return $option;
        }
        $str = @iconv($default, $option, $str);
        //不能转成 $option, 说明原来的不是 $default
        if (empty($str)) {
            return $option;
        }
        return $default;
    }
    /**
     * utf-8和gb2312自动转化
     * @param unknown $string
     * @param string $outEncoding
     * @return unknown|string
     */
    public static function safeEncoding($string,$outEncoding = 'UTF-8')
    {
        $encoding = "UTF-8";
        for($i = 0; $i < strlen ( $string ); $i ++) {
            if (ord ( $string {$i} ) < 128)
                continue;
            if ((ord ( $string {$i} ) & 224) == 224) {
                // 第一个字节判断通过
                $char = $string {++ $i};
                if ((ord ( $char ) & 128) == 128) {
                    // 第二个字节判断通过
                    $char = $string {++ $i};
                    if ((ord ( $char ) & 128) == 128) {
                        $encoding = "UTF-8";
                        break;
                    }
                }
            }
            if ((ord ( $string {$i} ) & 192) == 192) {
                // 第一个字节判断通过
                $char = $string {++ $i};
                if ((ord ( $char ) & 128) == 128) {
                    // 第二个字节判断通过
                    $encoding = "GB2312";
                    break;
                }
            }
        }
        if (strtoupper ( $encoding ) == strtoupper ( $outEncoding ))
            return $string;
        else
            return @iconv ( $encoding, $outEncoding, $string );
    }
    /**
     * 返回二维数组中某个键名的所有值
     * @param input $array
     * @param string $key
     * @return array
     */
    public static function array_key_values($array =array(), $key='')
    {
        $ret = array();
        foreach((array)$array as $k=>$v){
            $ret[$k] = $v[$key];
        }
        return $ret;
    }
    /**
     * 判断 文件/目录 是否可写(取代系统自带的 is_writeable 函数)
     * @param string $file 文件/目录
     * @return boolean
     */
    public static function is_writeable($file) {
        if (is_dir($file)){
            $dir = $file;
            if ($fp = @fopen("$dir/test.txt", 'w')) {
                @fclose($fp);
                @unlink("$dir/test.txt");
                $writeable = 1;
            } else {
                $writeable = 0;
            }
        } else {
            if ($fp = @fopen($file, 'a+')) {
                @fclose($fp);
                $writeable = 1;
            } else {
                $writeable = 0;
            }
        }
        return $writeable;
    }
    /**
     * 格式化单位
     */
    static public function byteFormat( $size, $dec = 2 ) {
        $a = array ( "B" , "KB" , "MB" , "GB" , "TB" , "PB" );
        $pos = 0;
        while ( $size >= 1024 ) {
            $size /= 1024;
            $pos ++;
        }
        return round( $size, $dec ) . " " . $a[$pos];
    }
    /**
     * 下拉框,单选按钮 自动选择
     *
     * @param $string 输入字符
     * @param $param  条件
     * @param $type   类型
     * selected checked
     * @return string
     */
    static public function selected( $string, $param = 1, $type = 'select' ) {
        $true = false;
        if ( is_array( $param ) ) {
            $true = in_array( $string, $param );
        }elseif ( $string == $param ) {
            $true = true;
        }
        $return='';
        if ( $true )
            $return = $type == 'select' ? 'selected="selected"' : 'checked="checked"';
        echo $return;
    }
    /**
     * 下载远程图片
     * @param string $url 图片的绝对url
     * @param string $filepath 文件的完整路径(例如/www/images/test) ,此函数会自动根据图片url和http头信息确定图片的后缀名
     * @param string $filename 要保存的文件名(不含扩展名)
     * @return mixed 下载成功返回一个描述图片信息的数组,下载失败则返回false
     */
    static public function downloadImage($url, $filepath, $filename) {
        //服务器返回的头信息
        $responseHeaders = array();
        //原始图片名
        $originalfilename = '';
        //图片的后缀名
        $ext = '';
        $ch = curl_init($url);
        //设置curl_exec返回的值包含Http头
        curl_setopt($ch, CURLOPT_HEADER, 1);
        //设置curl_exec返回的值包含Http内容
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        //设置抓取跳转(http 301,302)后的页面
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        //设置最多的HTTP重定向的数量
        curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
        //服务器返回的数据(包括http头信息和内容)
        $html = curl_exec($ch);
        //获取此次抓取的相关信息
        $httpinfo = curl_getinfo($ch);
        curl_close($ch);
        if ($html !== false) {
            //分离response的header和body,由于服务器可能使用了302跳转,所以此处需要将字符串分离为 2+跳转次数 个子串
            $httpArr = explode("\r\n\r\n", $html, 2 + $httpinfo['redirect_count']);
            //倒数第二段是服务器最后一次response的http头
            $header = $httpArr[count($httpArr) - 2];
            //倒数第一段是服务器最后一次response的内容
            $body = $httpArr[count($httpArr) - 1];
            $header.="\r\n";
            //获取最后一次response的header信息
            preg_match_all('/([a-z0-9-_]+):\s*([^\r\n]+)\r\n/i', $header, $matches);
            if (!empty($matches) && count($matches) == 3 && !empty($matches[1]) && !empty($matches[1])) {
                for ($i = 0; $i < count($matches[1]); $i++) {
                    if (array_key_exists($i, $matches[2])) {
                        $responseHeaders[$matches[1][$i]] = $matches[2][$i];
                    }
                }
            }
            //获取图片后缀名
            if (0 < preg_match('{(?:[^\/\\\\]+)\.(jpg|jpeg|gif|png|bmp)$}i', $url, $matches)) {
                $originalfilename = $matches[0];
                $ext = $matches[1];
            } else {
                if (array_key_exists('Content-Type', $responseHeaders)) {
                    if (0 < preg_match('{image/(\w+)}i', $responseHeaders['Content-Type'], $extmatches)) {
                        $ext = $extmatches[1];
                    }
                }
            }
            //保存文件
            if (!empty($ext)) {
                //如果目录不存在,则先要创建目录
                if(!is_dir($filepath)){
                    mkdir($filepath, 0777, true);
                }
                $filepath .= '/'.$filename.".$ext";
                $local_file = fopen($filepath, 'w');
                if (false !== $local_file) {
                    if (false !== fwrite($local_file, $body)) {
                        fclose($local_file);
                        $sizeinfo = getimagesize($filepath);
                        return array('filepath' => realpath($filepath), 'width' => $sizeinfo[0], 'height' => $sizeinfo[1], 'orginalfilename' => $originalfilename, 'filename' => pathinfo($filepath, PATHINFO_BASENAME));
                    }
                }
            }
        }
        return false;
    }
    /**
     * 查找ip是否在某个段位里面
     * @param string $ip 要查询的ip
     * @param $arrIP     禁止的ip
     * @return boolean
     */
    public static function ipAccess($ip='0.0.0.0', $arrIP = array()){
        $access = true;
        $ip && $arr_cur_ip = explode('.', $ip);
        foreach((array)$arrIP as $key=> $value){
            if($value == '*.*.*.*'){
                $access = false; //禁止所有
                break;
            }
            $tmp_arr = explode('.', $value);
            if(($arr_cur_ip[0] == $tmp_arr[0]) && ($arr_cur_ip[1] == $tmp_arr[1])) {
                //前两段相同
                if(($arr_cur_ip[2] == $tmp_arr[2]) || ($tmp_arr[2] == '*')){
                    //第三段为* 或者相同
                    if(($arr_cur_ip[3] == $tmp_arr[3]) || ($tmp_arr[3] == '*')){
                        //第四段为* 或者相同
                        $access = false; //在禁止ip列,则禁止访问
                        break;
                    }
                }
            }
        }
        return $access;
    }
    /**
     * @param string $string 原文或者密文
     * @param string $operation 操作(ENCODE | DECODE), 默认为 DECODE
     * @param string $key 密钥
     * @param int $expiry 密文有效期, 加密时候有效, 单位 秒,0 为永久有效
     * @return string 处理后的 原文或者 经过 base64_encode 处理后的密文
     *
     * @example
     *
     * $a = authcode('abc', 'ENCODE', 'key');
     * $b = authcode($a, 'DECODE', 'key');  // $b(abc)
     *
     * $a = authcode('abc', 'ENCODE', 'key', 3600);
     * $b = authcode('abc', 'DECODE', 'key'); // 在一个小时内,$b(abc),否则 $b 为空
     */
    public static function authcode($string, $operation = 'DECODE', $key = '', $expiry = 3600) {
        $ckey_length = 4;
        // 随机密钥长度 取值 0-32;
        // 加入随机密钥,可以令密文无任何规律,即便是原文和密钥完全相同,加密结果也会每次不同,增大破解难度。
        // 取值越大,密文变动规律越大,密文变化 = 16 的 $ckey_length 次方
        // 当此值为 0 时,则不产生随机密钥
        $key = md5 ( $key ? $key : 'key' ); //这里可以填写默认key值
        $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 ( 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 );
        $rndkey = array ();
        for($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 . str_replace ( '=', '', base64_encode ( $result ) );
        }
    }
    public static function gbkToUtf8($str){
        return iconv("GBK", "UTF-8", $str);
    }
    }

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