PHP 工具类库

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    <?php  
    /**   
    * 常用工具类   
    * author Lee.   
    * Last modify $Date: 2012-8-23 
    */  
    class Tool {  
        /** 
         * js 弹窗并且跳转 
         * @param string $_info 
         * @param string $_url 
         * @return js 
         */  
        static public function alertLocation($_info, $_url) {  
            echo "<script type='text/javascript'>alert('$_info');location.href='$_url';</script>";  
            exit();  
        }  
          
        /** 
         * js 弹窗返回 
         * @param string $_info 
         * @return js 
         */  
        static public function alertBack($_info) {  
            echo "<script type='text/javascript'>alert('$_info');history.back();</script>";  
            exit();  
        }  
          
        /** 
         * 页面跳转 
         * @param string $url 
         * @return js 
         */  
        static public function headerUrl($url) {  
            echo "<script type='text/javascript'>location.href='{$url}';</script>";  
            exit();  
        }  
          
        /** 
         * 弹窗关闭 
         * @param string $_info 
         * @return js 
         */  
        static public function alertClose($_info) {  
            echo "<script type='text/javascript'>alert('$_info');close();</script>";  
            exit();  
        }  
          
        /** 
         * 弹窗 
         * @param string $_info 
         * @return js 
         */  
        static public function alert($_info) {  
            echo "<script type='text/javascript'>alert('$_info');</script>";  
            exit();  
        }  
          
        /** 
         * 系统基本参数上传图片专用 
         * @param string $_path 
         * @return null 
         */  
        static public function sysUploadImg($_path) {  
            echo '<script type="text/javascript">document.getElementById("logo").value="'.$_path.'";</script>';  
            echo '<script type="text/javascript">document.getElementById("pic").src="'.$_path.'";</script>';  
            echo '<script type="text/javascript">$("#loginpop1").hide();</script>';  
            echo '<script type="text/javascript">$("#bgloginpop2").hide();</script>';  
        }  
          
        /** 
         * html过滤 
         * @param array|object $_date 
         * @return string 
         */  
        static public function htmlString($_date) {  
            if (is_array($_date)) {  
                foreach ($_date as $_key=>$_value) {  
                    $_string[$_key] = Tool::htmlString($_value);  //递归  
                }  
            } elseif (is_object($_date)) {  
                foreach ($_date as $_key=>$_value) {  
                    $_string->$_key = Tool::htmlString($_value);  //递归  
                }  
            } else {  
                $_string = htmlspecialchars($_date);  
            }  
            return $_string;  
        }  
          
        /** 
         * 数据库输入过滤 
         * @param string $_data 
         * @return string 
         */  
        static public function mysqlString($_data) {  
            $_data = trim($_data);  
            return !GPC ? addcslashes($_data) : $_data;  
        }  
          
        /** 
         * 清理session 
         */  
        static public function unSession() {  
            if (session_start()) {  
                session_destroy();  
            }  
        }  
          
        /** 
         * 验证是否为空 
         * @param string $str 
         * @param string $name 
         * @return bool (true or false) 
         */  
        static function validateEmpty($str, $name) {  
            if (empty($str)) {  
                self::alertBack('警告:' .$name . '不能为空!');  
            }  
        }  
          
        /** 
         * 验证是否相同 
         * @param string $str1 
         * @param string $str2 
         * @param string $alert 
         * @return JS  
         */  
        static function validateAll($str1, $str2, $alert) {  
            if ($str1 != $str2) self::alertBack('警告:' .$alert);  
        }  
          
        /** 
         * 验证ID 
         * @param Number $id 
         * @return JS 
         */  
        static function validateId($id) {  
            if (empty($id) || !is_numeric($id)) self::alertBack('警告:参数错误!');  
        }  
          
        /** 
         * 格式化字符串 
         * @param string $str 
         * @return string 
         */  
        static public function formatStr($str) {  
            $arr = array(' ', ' ', '&', '@', '#', '%',  '\'', '"', '\\', '/', '.', ',', '$', '^', '*', '(', ')', '[', ']', '{', '}', '|', '~', '`', '?', '!', ';', ':', '-', '_', '+', '=');  
            foreach ($arr as $v) {  
                $str = str_replace($v, '', $str);  
            }  
            return $str;  
        }  
          
        /** 
         * 格式化时间 
         * @param int $time 时间戳 
         * @return string 
         */  
        static public function formatDate($time='default') {  
            $date = $time == 'default' ? date('Y-m-d H:i:s', time()) : date('Y-m-d H:i:s', $time);  
            return $date;  
        }  
          
        /**   
        * 获得真实IP地址   
        * @return string   
        */  
        static public function realIp() {     
            static $realip = NULL;     
            if ($realip !== NULL) return $realip;    
            if (isset($_SERVER)) {    
                if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {     
                    $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);    
                    foreach ($arr AS $ip) {    
                        $ip = trim($ip);    
                        if ($ip != 'unknown') {     
                            $realip = $ip;     
                            break;     
                        }     
                    }     
                } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {     
                    $realip = $_SERVER['HTTP_CLIENT_IP'];    
                } else {     
                    if (isset($_SERVER['REMOTE_ADDR'])) {     
                        $realip = $_SERVER['REMOTE_ADDR'];     
                    } else {     
                        $realip = '0.0.0.0';     
                    }    
                }    
            } else {    
                if (getenv('HTTP_X_FORWARDED_FOR')) {    
                    $realip = getenv('HTTP_X_FORWARDED_FOR');    
                } elseif (getenv('HTTP_CLIENT_IP')) {    
                    $realip = getenv('HTTP_CLIENT_IP');    
                } else {    
                    $realip = getenv('REMOTE_ADDR');    
                }    
            }  
            preg_match('/[\d\.]{7,15}/', $realip, $onlineip);    
            $realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';    
            return $realip;    
        }  
          
        /** 
         * 加载 Smarty 模板 
         * @param string $html 
         * @return null; 
         */  
        static public function display() {  
            global $tpl;$html = null;  
            $htmlArr = explode('/', $_SERVER[SCRIPT_NAME]);  
            $html = str_ireplace('.php', '.html', $htmlArr[count($htmlArr)-1]);  
            $dir = dirname($_SERVER[SCRIPT_NAME]);  
            $firstStr = substr($dir, 0, 1);  
            $endStr = substr($dir, strlen($dir)-1, 1);  
            if ($firstStr == '/' || $firstStr == '\\') $dir = substr($dir, 1);  
            if ($endStr != '/' || $endStr != '\\') $dir = $dir . '/';  
            $tpl->display($dir.$html);  
        }  
          
        /** 
         * 创建目录 
         * @param string $dir 
         */  
        static public function createDir($dir) {  
            if (!is_dir($dir)) {  
                mkdir($dir, 0777);  
            }  
        }  
          
        /** 
         * 创建文件(默认为空) 
         * @param unknown_type $filename 
         */  
        static public function createFile($filename) {  
            if (!is_file($filename)) touch($filename);  
        }  
          
        /** 
         * 正确获取变量 
         * @param string $param 
         * @param string $type 
         * @return string 
         */  
        static public function getData($param, $type='post') {  
            $type = strtolower($type);  
            if ($type=='post') {  
                return Tool::mysqlString(trim($_POST[$param]));  
            } elseif ($type=='get') {  
                return Tool::mysqlString(trim($_GET[$param]));  
            }  
        }  
          
        /** 
         * 删除文件 
         * @param string $filename 
         */  
        static public function delFile($filename) {  
            if (file_exists($filename)) unlink($filename);  
        }  
          
        /** 
         * 删除目录 
         * @param string $path 
         */  
        static public function delDir($path) {  
            if (is_dir($path)) rmdir($path);  
        }  
          
        /** 
         * 删除目录及地下的全部文件 
         * @param string $dir 
         * @return bool 
         */  
        static public function delDirOfAll($dir) {  
            //先删除目录下的文件:  
            if (is_dir($dir)) {  
                $dh=opendir($dir);  
                while (!!$file=readdir($dh)) {  
                    if($file!="." && $file!="..") {  
                        $fullpath=$dir."/".$file;  
                        if(!is_dir($fullpath)) {  
                            unlink($fullpath);  
                        } else {  
                            self::delDirOfAll($fullpath);  
                        }  
                    }  
                }  
                closedir($dh);  
                //删除当前文件夹:  
                if(rmdir($dir)) {  
                    return true;  
                } else {  
                    return false;  
                }  
            }  
        }  
      
        /** 
         * 验证登陆 
         */  
        static public function validateLogin() {  
            if (empty($_SESSION['admin']['user'])) header('Location:/admin/');  
        }  
          
        /** 
         * 给已经存在的图片添加水印 
         * @param string $file_path 
         * @return bool 
         */  
        static public function addMark($file_path) {  
            if (file_exists($file_path) && file_exists(MARK)) {  
                //求出上传图片的名称后缀  
                $ext_name = strtolower(substr($file_path, strrpos($file_path, '.'), strlen($file_path)));  
                //$new_name='jzy_' . time() . rand(1000,9999) . $ext_name ;  
                $store_path = ROOT_PATH . UPDIR;  
                //求上传图片高宽  
                $imginfo = getimagesize($file_path);  
                $width = $imginfo[0];  
                $height = $imginfo[1];  
                 //添加图片水印               
                switch($ext_name) {  
                    case '.gif':  
                        $dst_im = imagecreatefromgif($file_path);  
                        break;  
                    case '.jpg':  
                        $dst_im = imagecreatefromjpeg($file_path);  
                        break;  
                    case '.png':  
                        $dst_im = imagecreatefrompng($file_path);  
                        break;  
                }  
                $src_im = imagecreatefrompng(MARK);  
                //求水印图片高宽  
                $src_imginfo = getimagesize(MARK);  
                $src_width = $src_imginfo[0];  
                $src_height = $src_imginfo[1];  
                //求出水印图片的实际生成位置  
                $src_x = $width - $src_width - 10;  
                $src_y = $height - $src_height - 10;  
                //新建一个真彩色图像  
                $nimage = imagecreatetruecolor($width, $height);                 
                //拷贝上传图片到真彩图像  
                imagecopy($nimage, $dst_im, 0, 0, 0, 0, $width, $height);            
                //按坐标位置拷贝水印图片到真彩图像上  
                imagecopy($nimage, $src_im, $src_x, $src_y, 0, 0, $src_width, $src_height);  
                //分情况输出生成后的水印图片  
                switch($ext_name) {  
                    case '.gif':  
                        imagegif($nimage, $file_path);  
                        break;  
                    case '.jpg':  
                        imagejpeg($nimage, $file_path);  
                        break;  
                    case '.png':  
                        imagepng($nimage, $file_path);  
                        break;       
                }  
                //释放资源   
                imagedestroy($dst_im);  
                imagedestroy($src_im);  
                unset($imginfo);  
                unset($src_imginfo);  
                //移动生成后的图片  
                @move_uploaded_file($file_path, ROOT_PATH.UPDIR . $file_path);  
            }  
        }  
          
        /** 
        *  中文截取2,单字节截取模式 
        * @access public 
        * @param string $str  需要截取的字符串 
        * @param int $slen  截取的长度 
        * @param int $startdd  开始标记处 
        * @return string 
        */  
        static public function cn_substr($str, $slen, $startdd=0){  
            $cfg_soft_lang = PAGECHARSET;  
            if($cfg_soft_lang=='utf-8') {  
                return self::cn_substr_utf8($str, $slen, $startdd);  
            }  
            $restr = '';  
            $c = '';  
            $str_len = strlen($str);  
            if($str_len < $startdd+1) {  
                return '';  
            }  
            if($str_len < $startdd + $slen || $slen==0) {  
                $slen = $str_len - $startdd;  
            }  
            $enddd = $startdd + $slen - 1;  
            for($i=0;$i<$str_len;$i++) {  
                if($startdd==0) {  
                    $restr .= $c;  
                } elseif($i > $startdd) {  
                    $restr .= $c;  
                }  
                if(ord($str[$i])>0x80) {  
                    if($str_len>$i+1) {  
                        $c = $str[$i].$str[$i+1];  
                    }  
                    $i++;  
                } else {  
                    $c = $str[$i];  
                }  
                if($i >= $enddd) {  
                    if(strlen($restr)+strlen($c)>$slen) {  
                        break;  
                    } else {  
                        $restr .= $c;  
                        break;  
                    }  
                }  
            }  
            return $restr;  
        }  
      
        /** 
        *  utf-8中文截取,单字节截取模式 
        * 
        * @access public 
        * @param string $str 需要截取的字符串 
        * @param int $slen 截取的长度 
        * @param int $startdd 开始标记处 
        * @return string 
        */  
        static public function cn_substr_utf8($str, $length, $start=0) {  
            if(strlen($str) < $start+1) {  
                return '';  
            }  
            preg_match_all("/./su", $str, $ar);  
            $str = '';  
            $tstr = '';  
            //为了兼容mysql4.1以下版本,与数据库varchar一致,这里使用按字节截取  
            for($i=0; isset($ar[0][$i]); $i++) {  
                if(strlen($tstr) < $start) {  
                    $tstr .= $ar[0][$i];  
                } else {  
                    if(strlen($str) < $length + strlen($ar[0][$i]) ) {  
                        $str .= $ar[0][$i];  
                    } else {  
                        break;  
                    }  
                }  
            }  
            return $str;  
        }  
          
        /** 
         * 删除图片,根据图片ID 
         * @param int $image_id 
         */  
        static function delPicByImageId($image_id) {  
            $db_name = PREFIX . 'images i';  
            $m = new Model();  
            $data = $m->getOne($db_name, "i.id={$image_id}", "i.path as p, i.big_img as b, i.small_img as s");  
            foreach ($data as $v) {  
                @self::delFile(ROOT_PATH . $v['p']);  
                @self::delFile(ROOT_PATH . $v['b']);  
                @self::delFile(ROOT_PATH . $v['s']);  
            }  
            $m->del(PREFIX . 'images', "id={$image_id}");  
            unset($m);  
        }  
          
        /** 
         * 图片等比例缩放 
         * @param resource $im    新建图片资源(imagecreatefromjpeg/imagecreatefrompng/imagecreatefromgif) 
         * @param int $maxwidth   生成图像宽 
         * @param int $maxheight  生成图像高 
         * @param string $name    生成图像名称 
         * @param string $filetype文件类型(.jpg/.gif/.png) 
         */  
        static public function resizeImage($im, $maxwidth, $maxheight, $name, $filetype) {  
            $pic_width = imagesx($im);  
            $pic_height = imagesy($im);  
            if(($maxwidth && $pic_width > $maxwidth) || ($maxheight && $pic_height > $maxheight)) {  
                if($maxwidth && $pic_width>$maxwidth) {  
                    $widthratio = $maxwidth/$pic_width;  
                    $resizewidth_tag = true;  
                }  
                if($maxheight && $pic_height>$maxheight) {  
                    $heightratio = $maxheight/$pic_height;  
                    $resizeheight_tag = true;  
                }  
                if($resizewidth_tag && $resizeheight_tag) {  
                    if($widthratio<$heightratio)  
                        $ratio = $widthratio;  
                    else  
                        $ratio = $heightratio;  
                }  
                if($resizewidth_tag && !$resizeheight_tag)  
                    $ratio = $widthratio;  
                if($resizeheight_tag && !$resizewidth_tag)  
                    $ratio = $heightratio;  
                $newwidth = $pic_width * $ratio;  
                $newheight = $pic_height * $ratio;  
                if(function_exists("imagecopyresampled")) {  
                    $newim = imagecreatetruecolor($newwidth,$newheight);  
                    imagecopyresampled($newim,$im,0,0,0,0,$newwidth,$newheight,$pic_width,$pic_height);  
                } else {  
                    $newim = imagecreate($newwidth,$newheight);  
                    imagecopyresized($newim,$im,0,0,0,0,$newwidth,$newheight,$pic_width,$pic_height);  
                }  
                $name = $name.$filetype;  
                imagejpeg($newim,$name);  
                imagedestroy($newim);  
            } else {  
                $name = $name.$filetype;  
                imagejpeg($im,$name);  
            }  
        }  
      
        /** 
         * 下载文件 
         * @param string $file_path 绝对路径 
         */  
        static public function downFile($file_path) {  
            //判断文件是否存在  
            $file_path = iconv('utf-8', 'gb2312', $file_path); //对可能出现的中文名称进行转码  
            if (!file_exists($file_path)) {  
                exit('文件不存在!');  
            }  
            $file_name = basename($file_path); //获取文件名称  
            $file_size = filesize($file_path); //获取文件大小  
            $fp = fopen($file_path, 'r'); //以只读的方式打开文件  
            header("Content-type: application/octet-stream");  
            header("Accept-Ranges: bytes");  
            header("Accept-Length: {$file_size}");  
            header("Content-Disposition: attachment;filename={$file_name}");  
            $buffer = 1024;  
            $file_count = 0;  
            //判断文件是否结束  
            while (!feof($fp) && ($file_size-$file_count>0)) {  
                $file_data = fread($fp, $buffer);  
                $file_count += $buffer;  
                echo $file_data;  
            }  
            fclose($fp); //关闭文件  
        }  
    }  
    ?>