PHP多图片上传类推荐

多文件上传是PHP中的一个基础应用，反正PHPer都会遇到的问题，现在就介绍一个功能完善、强大的多文件上传类给大家吧，能用上这个类的地方会很多。

<?php  
  
class Upload{  
    var $saveName;// 保存名  
    var $savePath;// 保存路径  
    var $fileFormat = array('gif','jpg','doc','application/octet-stream');// 文件格式&MIME限定  
    var $overwrite = 0;// 覆盖模式  
    var $maxSize = 0;// 文件最大字节  
    var $ext;// 文件扩展名  
    var $thumb = 0;// 是否生成缩略图  
    var $thumbWidth = 130;// 缩略图宽  
    var $thumbHeight = 130;// 缩略图高  
    var $thumbPrefix = "_thumb_";// 缩略图前缀  
    var $errno;// 错误代号  
    var $returnArray= array();// 所有文件的返回信息  
    var $returninfo= array();// 每个文件返回信息  
  
  
// 构造函数  
// @param $savePath 文件保存路径  
// @param $fileFormat 文件格式限制数组  
// @param $maxSize 文件最大尺寸  
// @param $overwriet 是否覆盖 1 允许覆盖 0 禁止覆盖  
  
    function Upload($savePath, $fileFormat='',$maxSize = 0, $overwrite = 0) {  
        $this->setSavepath($savePath);  
        $this->setFileformat($fileFormat);  
        $this->setMaxsize($maxSize);  
        $this->setOverwrite($overwrite);  
        $this->setThumb($this->thumb, $this->thumbWidth,$this->thumbHeight);  
        $this->errno = 0;  
    }  
  
// 上传  
// @param $fileInput 网页Form(表单)中input的名称  
// @param $changeName 是否更改文件名  
    function run($fileInput,$changeName = 1){  
        if(isset($_FILES[$fileInput])){  
            $fileArr = $_FILES[$fileInput];  
            if(is_array($fileArr['name'])){//上传同文件域名称多个文件  
                for($i = 0; $i < count($fileArr['name']); $i++){  
                    $ar['tmp_name'] = $fileArr['tmp_name'][$i];  
                    $ar['name'] = $fileArr['name'][$i];  
                    $ar['type'] = $fileArr['type'][$i];  
                    $ar['size'] = $fileArr['size'][$i];  
                    $ar['error'] = $fileArr['error'][$i];  
                    $this->getExt($ar['name']);//取得扩展名，赋给$this->ext，下次循环会更新  
                    $this->setSavename($changeName == 1 ? '' : $ar['name']);//设置保存文件名  
                    if($this->copyfile($ar)){  
                        $this->returnArray[] =  $this->returninfo;  
                    }else{  
                        $this->returninfo['error'] = $this->errmsg();  
                        $this->returnArray[] =  $this->returninfo;  
                    }  
                }  
                return $this->errno ?  false :  true;  
            }else{//上传单个文件  
                $this->getExt($fileArr['name']);//取得扩展名  
                $this->setSavename($changeName == 1 ? '' : $fileArr['name']);//设置保存文件名  
                if($this->copyfile($fileArr)){  
                    $this->returnArray[] =  $this->returninfo;  
                }else{  
                    $this->returninfo['error'] = $this->errmsg();  
                    $this->returnArray[] =  $this->returninfo;  
                }  
                return $this->errno ?  false :  true;  
            }  
            return false;  
        }else{  
            $this->errno = 10;  
            return false;  
        }  
    }  
  
// 单个文件上传  
// @param $fileArray 文件信息数组  
    function copyfile($fileArray){  
        $this->returninfo = array();  
        // 返回信息  
        $this->returninfo['name'] = $fileArray['name'];  
        $this->returninfo['md5'] = @md5_file($fileArray['tmp_name']);  
        $this->returninfo['saveName'] = $this->saveName;  
        $this->returninfo['size'] = number_format( ($fileArray['size'])/1024 , 0, '.', ' ');//以KB为单位  
        $this->returninfo['type'] = $fileArray['type'];  
        // 检查文件格式  
        if (!$this->validateFormat()){  
            $this->errno = 11;  
            return false;  
        }  
        // 检查目录是否可写  
        if(!@is_writable($this->savePath)){  
            $this->errno = 12;  
            return false;  
        }  
        // 如果不允许覆盖，检查文件是否已经存在  
        //if($this->overwrite == 0 && @file_exists($this->savePath.$fileArray['name'])){  
        //  $this->errno = 13;  
        //  return false;  
        //}  
        // 如果有大小限制，检查文件是否超过限制  
        if ($this->maxSize != 0 ){  
            if ($fileArray["size"] > $this->maxSize){  
                $this->errno = 14;  
                return false;  
            }  
        }  
        // 文件上传  
        if(!@move_uploaded_file($fileArray["tmp_name"], $this->savePath.$this->saveName)){  
            $this->errno = $fileArray["error"];  
            return false;  
        }elseif( $this->thumb ){// 创建缩略图  
            $CreateFunction = "imagecreatefrom".($this->ext == 'jpg' ? 'jpeg' : $this->ext);  
            $SaveFunction = "image".($this->ext == 'jpg' ? 'jpeg' : $this->ext);  
            if (strtolower($CreateFunction) == "imagecreatefromgif"   
                && !function_exists("imagecreatefromgif")) {  
                $this->errno = 16;  
                return false;  
            } elseif (strtolower($CreateFunction) == "imagecreatefromjpeg"   
                && !function_exists("imagecreatefromjpeg")) {  
                $this->errno = 17;  
                return false;  
            } elseif (!function_exists($CreateFunction)) {  
                $this->errno = 18;  
                return false;  
            }  
                  
            $Original = @$CreateFunction($this->savePath.$this->saveName);  
            if (!$Original) {$this->errno = 19; return false;}  
            $originalHeight = ImageSY($Original);  
            $originalWidth = ImageSX($Original);  
            $this->returninfo['originalHeight'] = $originalHeight;  
            $this->returninfo['originalWidth'] = $originalWidth;  
            /* 
            if (($originalHeight < $this->thumbHeight  
                && $originalWidth < $this->thumbWidth)) { 
                // 如果比期望的缩略图小，那只Copy 
                move_uploaded_file($this->savePath.$this->saveName,  
                    $this->savePath.$this->thumbPrefix.$this->saveName); 
            } else { 
                if( $originalWidth > $this->thumbWidth ){// 宽 > 设定宽度 
                    $thumbWidth = $this->thumbWidth ; 
                    $thumbHeight = $this->thumbWidth * ( $originalHeight / $originalWidth ); 
                    if($thumbHeight > $this->thumbHeight){// 高 > 设定高度 
                        $thumbWidth = $this->thumbHeight * ( $thumbWidth / $thumbHeight ); 
                        $thumbHeight = $this->thumbHeight ; 
                    } 
                }elseif( $originalHeight > $this->thumbHeight ){// 高 > 设定高度 
                    $thumbHeight = $this->thumbHeight ; 
                    $thumbWidth = $this->thumbHeight * ( $originalWidth / $originalHeight ); 
                    if($thumbWidth > $this->thumbWidth){// 宽 > 设定宽度 
                        $thumbHeight = $this->thumbWidth * ( $thumbHeight / $thumbWidth ); 
                        $thumbWidth = $this->thumbWidth ; 
                    } 
                } 
                */  
                $radio=max(($originalWidth/$this->thumbWidth),($originalHeight/$this->thumbHeight));  
                $thumbWidth=(int)$originalWidth/$radio;  
                $thumbHeight=(int)$originalHeight/$radio;  
  
                if ($thumbWidth == 0) $thumbWidth = 1;  
                if ($thumbHeight == 0) $thumbHeight = 1;  
                $createdThumb = imagecreatetruecolor($thumbWidth, $thumbHeight);  
                if ( !$createdThumb ) {$this->errno = 20; return false;}  
                if ( !imagecopyresampled($createdThumb, $Original, 0, 0, 0, 0,   
                    $thumbWidth, $thumbHeight, $originalWidth, $originalHeight) )  
                    {$this->errno = 21; return false;}  
                if ( !$SaveFunction($createdThumb,   
                    $this->savePath.$this->thumbPrefix.$this->saveName) )  
                    {$this->errno = 22; return false;}  
              
        }  
        // 删除临时文件  
        /* 
        if(!@$this->del($fileArray["tmp_name"])){ 
            return false; 
        } 
        */  
        return true;  
    }  
  
// 文件格式检查,MIME检测  
    function validateFormat(){  
        if(!is_array($this->fileFormat)   
            || in_array(strtolower($this->ext), $this->fileFormat)   
            || in_array(strtolower($this->returninfo['type']), $this->fileFormat) )  
            return true;  
        else  
            return false;  
    }  
// 获取文件扩展名  
// @param $fileName 上传文件的原文件名  
    function getExt($fileName){  
        $ext = explode(".", $fileName);  
        $ext = $ext[count($ext) - 1];  
        $this->ext = strtolower($ext);  
    }  
  
// 设置上传文件的最大字节限制  
// @param $maxSize 文件大小(bytes) 0:表示无限制  
    function setMaxsize($maxSize){  
        $this->maxSize = $maxSize;  
    }  
// 设置文件格式限定  
// @param $fileFormat 文件格式数组  
    function setFileformat($fileFormat){  
        if(is_array($fileFormat)){$this->fileFormat = $fileFormat ;}  
    }  
  
// 设置覆盖模式  
// @param overwrite 覆盖模式 1:允许覆盖 0:禁止覆盖  
    function setOverwrite($overwrite){  
        $this->overwrite = $overwrite;  
    }  
  
  
// 设置保存路径  
// @param $savePath 文件保存路径：以 "/" 结尾，若没有 "/"，则补上  
    function setSavepath($savePath){  
        $this->savePath = substr( str_replace("\\","/", $savePath) , -1) == "/"   
        ? $savePath : $savePath."/";  
    }  
  
// 设置缩略图  
// @param $thumb = 1 产生缩略图 $thumbWidth,$thumbHeight 是缩略图的宽和高  
    function setThumb($thumb, $thumbWidth = 0,$thumbHeight = 0){  
        $this->thumb = $thumb;  
        if($thumbWidth) $this->thumbWidth = $thumbWidth;  
        if($thumbHeight) $this->thumbHeight = $thumbHeight;  
    }  
  
// 设置文件保存名  
// @param $saveName 保存名，如果为空，则系统自动生成一个随机的文件名  
    function setSavename($saveName){  
        if ($saveName == ''){  // 如果未设置文件名，则生成一个随机文件名  
            $name = date('YmdHis')."_".rand(100,999).'.'.$this->ext;  
            //判断文件是否存在,不允许重复文件  
            if(file_exists($this->savePath . $name)){  
                $name = setSavename($saveName);  
                }  
        } else {  
            $name = $saveName;  
        }  
        $this->saveName = $name;  
    }  
  
// 删除文件  
// @param $fileName 所要删除的文件名  
    function del($fileName){  
        if(!@unlink($fileName)){  
            $this->errno = 15;  
            return false;  
        }  
        return true;  
    }  
  
// 返回上传文件的信息  
    function getInfo(){  
        return $this->returnArray;  
    }  
  
// 得到错误信息  
    function errmsg(){  
        $uploadClassError = array(  
            0   =>'There is no error, the file uploaded with success. ',  
            1   =>'The uploaded file exceeds the upload_max_filesize directive in php.ini.',  
            2   =>'The uploaded file exceeds the MAX_FILE_SIZE that was specified in the HTML form.',  
            3   =>'The uploaded file was only partially uploaded. ',  
            4   =>'No file was uploaded. ',  
            6   =>'Missing a temporary folder. Introduced in PHP 4.3.10 and PHP 5.0.3. ',  
            7   =>'Failed to write file to disk. Introduced in PHP 5.1.0. ',  
            10  =>'Input name is not unavailable!',  
            11  =>'The uploaded file is Unallowable!',  
            12  =>'Directory unwritable!',  
            13  =>'File exist already!',  
            14  =>'File is too big!',  
            15  =>'Delete file unsuccessfully!',  
            16  =>'Your version of PHP does not appear to have GIF thumbnailing support.',  
            17  =>'Your version of PHP does not appear to have JPEG thumbnailing support.',  
            18  =>'Your version of PHP does not appear to have pictures thumbnailing support.',  
            19  =>'An error occurred while attempting to copy the source image .   
                    Your version of php ('.phpversion().') may not have this image type support.',  
            20  =>'An error occurred while attempting to create a new image.',  
            21  =>'An error occurred while copying the source image to the thumbnail image.',  
            22  =>'An error occurred while saving the thumbnail image to the filesystem.   
                    Are you sure that PHP has been configured with both read and write access on this folder?',  
            );  
        if ($this->errno == 0)  
            return false;  
        else  
            return $uploadClassError[$this->errno];  
    }  
}  
  
?>  

如何使用这个类呢？

<?php  
//如果收到表单传来的参数，则进行上传处理，否则显示表单  
if(isset($_FILES['uploadinput'])){  
    //建目录函数，其中参数$directoryName最后没有"/"，  
    //要是有的话，以'/'打散为数组的时候，最后将会出现一个空值  
    function makeDirectory($directoryName) {  
        $directoryName = str_replace("\\","/",$directoryName);  
        $dirNames = explode('/', $directoryName);  
        $total = count($dirNames) ;  
        $temp = '';  
        for($i=0; $i<$total; $i++) {  
            $temp .= $dirNames[$i].'/';  
            if (!is_dir($temp)) {  
                $oldmask = umask(0);  
                if (!mkdir($temp, 0777)) exit("不能建立目录 $temp");   
                umask($oldmask);  
            }  
        }  
        return true;  
    }  
  
    if($_FILES['uploadinput']['name'] <> ""){  
        //包含上传文件类  
        require_once ('upload_class.php');  
        //设置文件上传目录  
        $savePath = "upload";  
        //创建目录  
        makeDirectory($savePath);  
        //允许的文件类型  
        $fileFormat = array('gif','jpg','jpge','png');  
        //文件大小限制，单位: Byte，1KB = 1000 Byte  
        //0 表示无限制，但受php.ini中upload_max_filesize设置影响  
        $maxSize = 0;  
        //覆盖原有文件吗？ 0 不允许  1 允许   
        $overwrite = 0;  
        //初始化上传类  
        $f = new Upload( $savePath, $fileFormat, $maxSize, $overwrite);  
        //如果想生成缩略图，则调用成员函数 $f->setThumb();  
        //参数列表: setThumb($thumb, $thumbWidth = 0,$thumbHeight = 0)  
        //$thumb=1 表示要生成缩略图，不调用时，其值为 0  
        //$thumbWidth  缩略图宽，单位是像素(px)，留空则使用默认值 130  
        //$thumbHeight 缩略图高，单位是像素(px)，留空则使用默认值 130  
        $f->setThumb(1);  
          
        //参数中的uploadinput是表单中上传文件输入框input的名字  
        //后面的0表示不更改文件名，若为1，则由系统生成随机文件名  
        if (!$f->run('uploadinput',1)){  
            //通过$f->errmsg()只能得到最后一个出错的信息，  
            //详细的信息在$f->getInfo()中可以得到。  
            echo $f->errmsg()."<br>\n";  
        }  
        //上传结果保存在数组returnArray中。  
        echo "<pre>";  
        print_r($f->getInfo());  
        echo "</pre>";  
    }  
}else{  
?>  
<form enctype="multipart/form-data" action="" method="POST">  
Send this file: <br />  
<input name="uploadinput[]" type="file"><br />  
<input name="uploadinput[]" type="file"><br />  
<input name="uploadinput[]" type="file"><br />  
<input type="submit" value="Send File"><br />  
</form>   
<?php  
}  
  
?>