-
/**
- * 上传图片
- */
- class imgUpload{
- static protected $a;
- protected $formName; //表单名称
- protected $directory; //文件上传至目录
- protected $maxSize; //最大文件上传大小
- protected $canUpload; //是否可以上传
- protected $doUpFile; //上传的文件名
- protected $sm_File; //缩略图名称
-
- private function __construct($_formName='file', $_directory='./images/uploads/', $_maxSize=1048576){ //1024*1024=1M
- //初始化参数
- $this->formName = $_formName;
- $this->directory = $_directory;
- $this->maxSize = $_maxSize;
- $this->canUpload = true;
- $this->doUpFile = '';
- $this->sm_File = '';
- }
-
- //判断图片是否属于允许格式内
- static public function Type($_formName='file'){
- $_type = $_FILES[$_formName]['type'];
- switch ($_type){
- case 'image/gif':
- if (self::$a==NULL)
- self::$a = new imgUpload($_formName);
- break;
- case 'image/pjpeg':
- if (self::$a==NULL)
- self::$a = new imgUpload($_formName);
- break;
- case 'image/x-png':
- if (self::$a==NULL)
- self::$a = new imgUpload($_formName);
- break;
- default:
- self::$a = false;
- }
- return self::$a;
- }
-
- //获取文件大小
- public function getSize($_format='K'){
- if ($this->canUpload) {
- if (0 == $_FILES[$this->formName]['size']) {
- $this->canUpload = false;
- return $this->canUpload;
- break;
- }
- switch ($_format){
- case 'B':
- return $_FILES[$this->formName]['size'];
- break;
- case 'K':
- return round($_FILES[$this->formName]['size'] / 1024);
- break;
- case 'M':
- return round($_FILES[$this->formName]['size'] / (1024*1024),2);
- break;
- }
- }
- }
-
- //获取文件类型
- public function getExt(){
- if ($this->canUpload) {
- $_name = $_FILES[$this->formName]['name'];
- $_nameArr = explode('.',$_name);
- $_count = count($_nameArr)-1;
- }
- return $_nameArr[$_count];
- }
-
- //获取文件名称
- public function getName(){
- if ($this->canUpload) {
- return $_FILES[$this->formName]['name'];
- }
- }
-
- //新建文件名
- public function newName(){
- return date('YmdHis').rand(0,9);
- }
-
- //上传文件
- public function upload(){
- if ($this->canUpload)
- {
- $_getSize = $this->getSize('B');
- if (!$_getSize)
- {
- return $_getSize;
- break;
- }
- else
- {
- $_newName = $this->newName();
- $_ext = $this->getExt();
- $_doUpload = move_uploaded_file($_FILES[$this->formName]['tmp_name'], $this->directory.$_newName.".".$_ext);
- if ($_doUpload)
- {
- $this->doUpFile = $_newName;
- }
- return $_doUpload;
- }
- }
- }
-
- //创建缩略图
- public function thumb($_dstChar='_m', $_max_len=320){ //$_dstChar:_m , _s
- if ($this->canUpload && $this->doUpFile != "") {
- $_ext = $this->getExt();
- $_srcImage = $this->directory.$this->doUpFile.".".$_ext;
-
- //得到图片信息数组
- $_date = getimagesize($_srcImage, &$info);
-
- $src_w = $_date[0]; //源图片宽
- $src_h = $_date[1]; //源图片高
- $src_max_len = max($src_w, $src_h); //求得长边
- $src_min_len = min($src_w, $src_h); //求得短边
- $dst_w = ''; //目标图片宽
- $dst_h = ''; //目标图片高
-
- //宽高按比例缩放,最长边不大于$_max_len
- if ($src_max_len>$_max_len)
- {
- $percent = $src_min_len / $src_max_len;
- if ($src_w == $src_max_len)
- {
- $dst_w = $_max_len;
- $dst_h = $percent * $dst_w;
- }
- else
- {
- $dst_h = $_max_len;
- $dst_w = $percent * $dst_h;
- }
- }
- else
- {
- $dst_w = $src_w;
- $dst_h = $src_h;
- }
-
- //建立缩略图时,源图片的位置
- $src_x = '';
- $src_y = '';
-
- //判断如果缩略图用于logo,将对其进行裁减
- if ('s_' == $_dstChar) {
- $src_x = $src_w * 0.10;
- $src_y = $src_h * 0.10;
- $src_w *= 0.8;
- $src_h *= 0.8;
- }
-
- //判断图片类型并创建对应新图片
- switch ($_date[2]){
- case 1:
- $src_im = imagecreatefromgif($_srcImage);
- break;
- case 2:
- $src_im = imagecreatefromjpeg($_srcImage);
- break;
- case 3:
- $src_im = imagecreatefrompng($_srcImage);
- break;
- case 8:
- $src_im = imagecreatefromwbmp($_srcImage);
- break;
- }
-
- //创建一幅新图像
- if ($_date[2]==1) { //gif无法应用imagecreatetruecolor
- $dst_im = imagecreate($dst_w, $dst_h);
- }else {
- $dst_im = imagecreatetruecolor($dst_w, $dst_h);
- }
-
- //对这副图像进行缩略图copy
- // $bg = imagecolorallocate($dst_im,255,255,0);
- imagecopyresized($dst_im,$src_im, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
- //对图片进行抗锯齿操作
- imageantialias($dst_im, true);
-
- switch ($_date[2]) {
- case 1:
- $cr = imagegif($dst_im, $this->directory.$this->doUpFile.$_dstChar.".".$_ext, 100);
- break;
- case 2:
- $cr = imagejpeg($dst_im, $this->directory.$this->doUpFile.$_dstChar.".".$_ext, 100);
- break;
- case 3://imagepng有问题,所以在这里用imagejpg代替
- $cr = imagejpeg($dst_im, $this->directory.$this->doUpFile.$_dstChar.".".$_ext, 100);
- break;
- }
- // $cr = imagejpeg($dst_im, $this->directory.$_dstChar.$this->doUpFile, 90);
- if ($cr) {
- $this->sm_File = $this->directory.$this->doUpFile.$_dstChar.".".$_ext;
-
- return $this->sm_File;
- }else {
- return false;
- }
- }
- imagedestroy($dst_im);
- imagedestroy($cr);
- }
-
- //得到上传后的文件名
- public function getUpFile(){
- if ($this->doUpFile!='') {
- $_ext = $this->getExt();
- return $this->doUpFile.".".$_ext;
- }else {
- return false;
- }
- }
-
- //得到上传后的文件全路径
- public function getFilePatch(){
- if ($this->doUpFile!='') {
- $_ext = $this->getExt();
- return $this->directory.$this->doUpFile.".".$_ext;
- }else {
- return false;
- }
- }
-
- //得到缩略图文件全路径
- public function getThumb(){
- if ($this->sm_File!='') {
- return $this->sm_File;
- }else {
- return false;
- }
- }
- //得到上传文件的路径
- public function getDirectory(){
- if ($this->directory!='') {
- return $this->directory;
- }else {
- return false;
- }
- }
- }
- ?>
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