php图片上传类（支持缩放、裁剪、图片缩略功能）

/*** @author [Lee] <[<complet@163.com>]>* 1、自动验证文件是表单提交的文件还是base64流提交的文件* 2、验证图片类型是否合法* 3、验证图片尺寸是否合法* 4、验证图片大小是否合法* 5、支持缩放功能* 6、支持裁剪功能* 7、支持缩略图功能*/class fileuploader{private $file;private $type;public $suffix = array();public $measure = array();public $size = array();public $scale = array( ???????‘is_scale‘=>0, ???????‘ratio‘=>1 ???);public $crop = array( ???????‘is_crop‘=>0, ???????‘width‘=>0, ???????‘height‘=>0 ???);public $thumb = array( ???????‘is_thumb‘=>0, ???????‘width‘=>0, ???????‘height‘=>0 ???);public function __construct($file){ ???$this->file = $file; ???$this->getType();}/* 内部方法：获取图片类型 1、多文件 2、单文件 3、base64流文件 */private function getType(){ ???$file = $this->file; ???if(is_array($file)){ ???????// 多文件 ???????if(is_array($file[‘name‘])){ ???????????$type = 1; ???????}else{ ?// 单文件 ???????????$type = 2; ???????} ???}else{ ???????$type = 3; ???} ???$this->type = $type;}/* 内部方法：获取图片后缀 @param path 图片路径 @return suffix 后缀名 如：jpg */private function getSuffix($path) { ???$file = fopen($path, "rb"); ???$bin = fread($file, 2); // 只读2字节 ???fclose($file); ???$strInfo = @unpack("C2chars", $bin); ???$typeCode = intval($strInfo[‘chars1‘] . $strInfo[‘chars2‘]); ???$suffix = "unknow"; ???if($typeCode == 255216){ ???????$suffix = "jpg"; ???}elseif($typeCode == 7173){ ???????$suffix = "gif"; ???}elseif($typeCode == 13780){ ???????$suffix = "png"; ???}elseif($typeCode == 6677){ ???????$suffix = "bmp"; ???}elseif($typeCode == 7798){ ???????$suffix = "exe"; ???}elseif($typeCode == 7784){ ???????$suffix = "midi"; ???}elseif($typeCode == 8297){ ???????$suffix = "rar"; ???}elseif($typeCode == 7368){ ???????$suffix = "mp3"; ???}elseif($typeCode == 0){ ???????$suffix = "mp4"; ???}elseif($typeCode == 8273){ ???????$suffix = "wav"; ???} ???return $suffix;}/* 内部方法：保存流文件 @param stream 文件流 @param suffix 后缀 @param dir 保存文件夹 @return path 文件路径 */private function uploadBase64($stream,$suffix,$dir) { ???if (empty($stream)) return false; ???if (preg_match(‘/^(data:(\s)?(image|img)\/(\w+);base64,)/‘, $stream, $str)) { ???????$path = $dir . md5(rand(100000, 999999)) . ".{$suffix}"; ???????if (file_put_contents($path, base64_decode(str_replace($str[1], ‘‘, $stream)))) { ???????????return $path; ???????} else { ???????????return false; ???????} ???} else { ???????return false; ???}}/* 校验文件类型是否合法 @return ret true:合法 false:非法 */public function checkType(){ ???$file = $this->file; ???$type = $this->type; ???$validSuffix = $this->suffix; ???$ret = true; ???if($type==1){ ??// 多文件 ???????foreach($file[‘tmp_name‘] as $v){ ???????????$suffix = $this->getSuffix($v); ???????????if(!in_array($suffix,$validSuffix)){ ???????????????$ret = false; ???????????????break; ???????????} ???????} ???}elseif($type==2){ ?// 单文件 ???????$suffix = $this->getSuffix($file[‘tmp_name‘]); ???????if(!in_array($suffix,$validSuffix)){ ???????????$ret = false; ???????} ???}else{ ?// base64文件 ???????$suffix = $this->getSuffix($file); ???????if(!in_array($suffix,$validSuffix)){ ???????????$ret = false; ???????} ???} ???return $ret;}/* 校验文件尺寸是否合法 @return ret true:合法 false:非法 */public function checkMeasure(){ ???$file = $this->file; ???$type = $this->type; ???$validMeasure = $this->measure; ???$ret = true; ???if($type==1){ ??// 多文件 ???????foreach($file[‘tmp_name‘] as $v){ ???????????$measure = getimagesize($v); ???????????$width = $measure[0]; ???????????$height = $measure[1]; ???????????if(($width < $validMeasure[‘width‘][0] || $width > $validMeasure[‘width‘][1]) || ($height < $validMeasure[‘height‘][0] || $height > $validMeasure[‘height‘][1])){ ???????????????$ret = false; ???????????????break; ???????????} ???????} ???}elseif($type==2){ ?// 单文件 ???????$measure = getimagesize($file[‘tmp_name‘]); ???????$width = $measure[0]; ???????$height = $measure[1]; ???????if(($width < $validMeasure[‘width‘][0] || $width > $validMeasure[‘width‘][1]) || ($height < $validMeasure[‘height‘][0] || $height > $validMeasure[‘height‘][1])){ ???????????$ret = false; ???????} ???}else{ ?// base64文件 ???????$measure = getimagesize($file); ???????$width = $measure[0]; ???????$height = $measure[1]; ???????if(($width < $validMeasure[‘width‘][0] || $width > $validMeasure[‘width‘][1]) || ($height < $validMeasure[‘height‘][0] || $height > $validMeasure[‘height‘][1])){ ???????????$ret = false; ???????} ???} ???return $ret;}/* 校验文件大小是否合法 @return ret true:合法 false:非法 */public function checkSize(){ ???$file = $this->file; ???$type = $this->type; ???$validSize = $this->size; ???$ret = true; ???if($type==1){ ??// 多文件 ???????foreach($file[‘tmp_name‘] as $v){ ???????????$size = filesize($v); ???????????if(($size < $validSize[‘min‘]*1024*1024) || ($size > $validSize[‘max‘]*1024*1024)){ ???????????????$ret = false; ???????????????break; ???????????} ???????} ???}elseif($type==2){ ?// 单文件 ???????$size = filesize($file[‘tmp_name‘]); ???????if(($size < $validSize[‘min‘]*1024*1024) || ($size > $validSize[‘max‘]*1024*1024)){ ???????????$ret = false; ???????} ???}else{ ?// base64文件 ???????$size = filesize($file); ???????if(($size < $validSize[‘min‘]*1024*1024) || ($size > $validSize[‘max‘]*1024*1024)){ ???????????$ret = false; ???????} ???} ???return $ret;}/* 内部方法：缩放图片 */private function scale($path,$suffix,$ratio){ ???list($width, $height) = getimagesize($path); ?????$new_w = $ratio * $width; ???$new_h = $ratio * $height; ???$new_s = imagecreatetruecolor($new_w, $new_h); ???if(in_array($suffix,array(‘jpg‘,‘jpeg‘))){ ???????$img = imagecreatefromjpeg($path); ???}elseif($suffix == ‘png‘){ ???????$img = imagecreatefrompng($path); ???}elseif($suffix == ‘gif‘){ ???????$img = imagecreatefromgif($path); ???}else{ ???????return false; ???} ???$ret1 = imagecopyresized($new_s, $img, 0, 0, 0, 0, $new_w, $new_h, $width, $height); ?????if(in_array($suffix,array(‘jpg‘,‘jpeg‘))){ ???????$ret2 = imagejpeg($new_s, $path); ???}elseif($suffix == ‘png‘){ ???????$ret2 = imagepng($new_s, $path); ???}elseif($suffix == ‘gif‘){ ???????$ret2 = imagegif($new_s, $path); ???}else{ ???????return false; ???} ???imagedestroy($new_s); ?????imagedestroy($img); ???if($ret1 && $ret2){ ???????return $path; ???}else{ ???????return false; ???}}/* 内部方法：裁剪图片 */private function crop($path,$suffix,$cut_width,$cut_height){ ???$cut_x; ???$cut_y; ???$min; ???$size = getimagesize($path); ???$width = $size[0]; ???$height = $size[1]; ???$min = min($width,$height); ???$cut_width = ($cut_width > $min)?$min:$cut_width; ???$cut_height = ($cut_height > $min)?$min:$cut_height; ???$cut_x = ($width - $cut_width) / 2; ???$cut_y = ($height - $cut_height) / 2; ???if(in_array($suffix,array(‘jpg‘,‘jpeg‘))){ ???????$img = imagecreatefromjpeg($path); ???}elseif($suffix == ‘png‘){ ???????$img = imagecreatefrompng($path); ???}elseif($suffix == ‘gif‘){ ???????$img = imagecreatefromgif($path); ???}else{ ???????return false; ???} ???$new_s = imagecreatetruecolor($cut_width, $cut_height); ???$ret1 = imagecopyresampled($new_s, $img, 0, 0, $cut_x, $cut_y, $cut_width, $cut_height, $cut_width, $cut_height); ?????if(in_array($suffix,array(‘jpg‘,‘jpeg‘))){ ???????$ret2 = imagejpeg($new_s, $path); ???}elseif($suffix == ‘png‘){ ???????$ret2 = imagepng($new_s, $path); ???}elseif($suffix == ‘gif‘){ ???????$ret2 = imagegif($new_s, $path); ???}else{ ???????return false; ???} ???imagedestroy($new_s); ???imagedestroy($img); ???if($ret1 && $ret2){ ???????return $path; ???}else{ ???????return false; ???}}/* 内部方法：生成缩略图 */private function thumb($path,$suffix,$cut_width,$cut_height){ ???$cut_x; ???$cut_y; ???$ratio = 1; ???$size = getimagesize($path); ???$width = $size[0]; ???$height = $size[1]; ???$cw; ???$ch; ???if($width/$height >= $cut_width/$cut_height){ ???????$ratio = $cut_height / $height; ???}else{ ???????$ratio = $cut_width / $width; ???} ???$path = $this->scale($path,$suffix,$ratio,$path); ???$width *= $ratio; ???$height *= $ratio; ???$cut_x = abs($cut_width - $width) / 2; ???$cut_y = abs($cut_height - $height) / 2; ???if(in_array($suffix,array(‘jpg‘,‘jpeg‘))){ ???????$img = imagecreatefromjpeg($path); ???}elseif($suffix == ‘png‘){ ???????$img = imagecreatefrompng($path); ???}elseif($suffix == ‘gif‘){ ???????$img = imagecreatefromgif($path); ???}else{ ???????return false; ???} ???$new_s = imagecreatetruecolor($cut_width, $cut_height); ???$ret1 = imagecopyresampled($new_s, $img, 0, 0, $cut_x, $cut_y, $cut_width, $cut_height, $cut_width, $cut_height); ?????if(in_array($suffix,array(‘jpg‘,‘jpeg‘))){ ???????$ret2 = imagejpeg($new_s, $path); ???}elseif($suffix == ‘png‘){ ???????$ret2 = imagepng($new_s, $path); ???}elseif($suffix == ‘gif‘){ ???????$ret2 = imagegif($new_s, $path); ???}else{ ???????return false; ???} ???imagedestroy($new_s); ???imagedestroy($img); ???if($ret1 && $ret2){ ???????return $path; ???}else{ ???????return false; ???}}/* 保存 @param dir 存储的文件夹 如：‘./‘ @return ret 存储的文件路径 如：‘./test.jpg‘ */public function save($dir){ ???$file = $this->file; ???$type = $this->type; ???$scale = $this->scale; ???$crop = $this->crop; ???$thumb = $this->thumb; ???$is_scale = $scale[‘is_scale‘]; ???$is_crop = $crop[‘is_crop‘]; ???$is_thumb = $thumb[‘is_thumb‘]; ???$ratio = $scale[‘ratio‘]; ???$crop_width = $crop[‘width‘]; ???$crop_height = $crop[‘height‘]; ???$thumb_width = $thumb[‘width‘]; ???$thumb_height = $thumb[‘height‘]; ???if($type==1){ ??// 多文件 ???????foreach($file[‘tmp_name‘] as $k=>$v){ ???????????$suffix = $this->getSuffix($v); ???????????$name = $dir.md5(rand(100000,999999)).‘.‘.$suffix; ???????????$flag = file_put_contents($name,file_get_contents($v)); ???????????if(!$flag){ ???????????????$ret = false; ???????????}else{ ???????????????if($is_scale){ ???????????????????$name = $this->scale($name,$suffix,$ratio); ???????????????} ???????????????if($is_crop){ ???????????????????$name = $this->crop($name,$suffix,$crop_width,$crop_height); ???????????????} ???????????????if($is_thumb){ ???????????????????$name = $this->thumb($name,$suffix,$thumb_width,$thumb_height); ???????????????} ???????????????$ret[$k] = $name; ???????????} ???????} ???}elseif($type==2){ ?// 单文件 ???????$suffix = $this->getSuffix($file[‘tmp_name‘]); ???????$name = $dir.md5(rand(100000,999999)).‘.‘.$suffix; ???????$flag = file_put_contents($name,file_get_contents($file[‘tmp_name‘])); ???????if(!$flag){ ???????????$ret = false; ???????}else{ ???????????if($is_scale){ ???????????????$name = $this->scale($name,$suffix,$ratio); ???????????} ???????????if($is_crop){ ???????????????$name = $this->crop($name,$suffix,$crop_width,$crop_height); ???????????} ???????????if($is_thumb){ ???????????????$name = $this->thumb($name,$suffix,$thumb_width,$thumb_height); ???????????} ???????????$ret = $name; ???????} ???}else{ ?// base64文件 ???????$suffix = $this->getSuffix($file); ???????$name = $dir.md5(rand(100000,999999)).‘.‘.$suffix; ???????$flag = file_put_contents($name,file_get_contents($file)); ???????if(!$flag){ ???????????$ret = false; ???????}else{ ???????????if($is_scale){ ???????????????$name = $this->scale($name,$suffix,$ratio); ???????????} ???????????if($is_crop){ ???????????????$name = $this->crop($name,$suffix,$crop_width,$crop_height); ???????????} ???????????if($is_thumb){ ???????????????$name = $this->thumb($name,$suffix,$thumb_width,$thumb_height); ???????????} ???????????$ret = $name; ???????} ???} ???return $ret;}}

$file = $_FILES[‘file‘];$fileuploader = new fileuploader($file);$fileuploader->thumb = array( ???‘is_thumb‘=>1, ???‘width‘=>200, ???‘height‘=>500);$ret = $fileuploader->save(‘./‘);var_dump($ret);