本文實例為大家分享了php上傳類，供大家參考，具體內容如下
<?php
class UploadFile{
var $inputName; //控件名
var $allowType = array(
'image/gif','image/jpg','image/jpeg','image/png','image/x-png','image/pjpeg'
); //上傳類型
var $allowSize = 2097152; //限制大小
var $saveDir = UPLOAD; //保存目錄
var $isRename = true; //是否重命名，默認為true
var $errID = 0; //錯誤代碼，默認為0
var $errMsg = ""; //錯誤信息
var $savePath = ""; //保存路徑
function __construct($inputName,$allowType="",$allowSize="",$saveDir="",$isRename=true){
if(empty($inputName)){
$this->chk_err(-1); //無傳入控件名
}else{
$this->inputName = $inputName;
}
if(!empty($allowType)) $this->allowType = $allowType;
if(!empty($allowSize)) $this->allowSize = $allowSize;
if(!empty($saveDir)) $this->saveDir = $saveDir;
if(!empty($isRename)) $this->isRename = $isRename;
}
function is_uploaded(){
if(empty($_FILES[$this->inputName]['name'])){
$this->chk_err(4); //沒有文件被上傳
}else{
if(is_uploaded_file($_FILES[$this->inputName]['tmp_name'])){
return true;
}else{
$this->chk_err(-2); //文件上傳不合法
}
}
}
function chk_type(){
if(!in_array($_FILES[$this->inputName]['type'],$this->allowType)){
$this->chk_err(-3); //上傳的文件類型不被允許
}else{
return true;
}
}
function chk_size(){
if($_FILES[$this->inputName]['size'] > $this->allowSize){
$this->chk_(-4); //上傳的文件過大
}else{
return true;
}
}
function move_uploaded(){ //移動上傳文件
if(!$this->is_uploaded()){
return false;
}
if(!$this->chk_size()){
return false;
}
if(!$this->chk_type()){
return false;
}
//重命名
if($this->isRename){
$arrTmp = pathinfo($_FILES[$this->inputName]['name']);
$extension = strtolower($arrTmp['extension']);
$file_newname = date("YmdHis").rand(1000,9999)."00.".$extension; //重命名新文件， 00表示為上傳的為原圖
}else{
$file_newname = $_FILES[$this->inputName]['name'];
}
if(!file_exists($this->saveDir)){ //判斷保存目錄是否存在
mkdir($this->saveDir,0777,true); //建立保存目錄
}
//移動文件
$result = move_uploaded_file($_FILES[$this->inputName]['tmp_name'],$this->saveDir."/".$file_newname);
if($result){
$path = $this->savePath = $this->saveDir.$file_newname; //文件的成功保存路徑
return $path;
}else{
$this->chk_err($_FILES[$this->inputName]['error']);
}
}
//判斷出錯信息
function chk_err($errID){
$this->errID = $errID;
switch($this->errID){
case -4:
$this->errMsg = "上傳的文件過大";
break;
case -3:
$this->errMsg = "上傳的文件類型不被允許";
break;
case -2:
$this->errMsg = "文件上傳不合法";
break;
case -1:
$this->errMsg = "無控件名傳入";
break;
case 1:
$this->errMsg = '上傳的文件超出了php.ini中upload_max_filesize設定的最大值';
break;
case 2:
$this->errMsg = '上傳文件的大小超過了HTML表單中MAX_FILE_SIZE選項指定的值';
break;
case 3:
$this->errMsg = '文件只有部分被上傳';
break;
case 4:
$this->errMsg = '沒有文件被上傳';
break;
default:
break;
}
return false;
}
function get_errMsg(){
echo $this->errMsg; //輸出錯誤信息
}
/**
+----------------------------------------------------------
* 取得圖像信息
*
+----------------------------------------------------------
* @static
* @access public
+----------------------------------------------------------
* @param string $image 圖像文件名
+----------------------------------------------------------
* @return mixed
+----------------------------------------------------------
*/
function getImageInfo($img) {
$imageInfo = getimagesize($img);
if( $imageInfo!== false) {
$imageType = strtolower(substr(image_type_to_extension($imageInfo[2]),1));
$imageSize = filesize($img);
$info = array(
"width" =>$imageInfo[0],
"height" =>$imageInfo[1],
"type" =>$imageType,
"size" =>$imageSize,
"mime" =>$imageInfo['mime'],
);
return $info;
}else {
return false;
}
}
/**
+----------------------------------------------------------
* 生成縮略圖
+----------------------------------------------------------
* @static
* @access public
+----------------------------------------------------------
* @param string $image 原圖
* @param string $type 圖像格式
* @param string $thumbname 縮略圖文件名
* @param string $maxWidth 寬度
* @param string $maxHeight 高度
* @param string $position 縮略圖保存目錄
* @param boolean $interlace 啟用隔行掃描
* @param boolean $is_save 是否保留原圖
+----------------------------------------------------------
* @return void
+----------------------------------------------------------
*/
function thumb($image,$is_save=true,$suofang=0,$type='',$maxWidth=500,$maxHeight=500,$interlace=true){
// 獲取原圖信息
$info = $this->getImageInfo($image);
if($info !== false) {
$srcWidth = $info['width'];
$srcHeight = $info['height'];
$type = empty($type)?$info['type']:$type;
$type = strtolower($type);
$interlace = $interlace? 1:0;
unset($info);
if ($suofang==1) {
$width = $srcWidth;
$height = $srcHeight;
} else {
$scale = min($maxWidth/$srcWidth, $maxHeight/$srcHeight); // 計算縮放比例
if($scale>=1) {
// 超過原圖大小不再縮略
$width = $srcWidth;
$height = $srcHeight;
}else{
// 縮略圖尺寸
$width = (int)($srcWidth*$scale); //147
$height = (int)($srcHeight*$scale); //199
}
}
// 載入原圖
$createFun = 'ImageCreateFrom'.($type=='jpg'?'jpeg':$type);
$srcImg = $createFun($image);
//創建縮略圖
if($type!='gif' && function_exists('imagecreatetruecolor'))
$thumbImg = imagecreatetruecolor($width, $height);
else
$thumbImg = imagecreate($width, $height);
// 復制圖片
if(function_exists("ImageCopyResampled"))
imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth,$srcHeight);
else
imagecopyresized($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth,$srcHeight);
if('gif'==$type || 'png'==$type) {
//imagealphablending($thumbImg, false);//取消默認的混色模式
//imagesavealpha($thumbImg,true);//設定保存完整的 alpha 通道信息
$background_color = imagecolorallocate($thumbImg, 0,255,0); // 指派一個綠色
imagecolortransparent($thumbImg,$background_color); // 設置為透明色，若注釋掉該行則輸出綠色的圖
}
// 對jpeg圖形設置隔行掃描
if('jpg'==$type || 'jpeg'==$type) imageinterlace($thumbImg,$interlace);
//$gray=ImageColorAllocate($thumbImg,255,0,0);
//ImageString($thumbImg,2,5,5,"ThinkPHP",$gray);
// 生成圖片
$imageFun = 'image'.($type=='jpg'?'jpeg':$type);
$length = strlen("00.".$type) * (-1);
$_type = substr($image,-4);
$length = ($type != $_type ? $length+1 : $length);
//裁剪
if ($suofang==1) {
$thumbname01 = substr_replace($image,"01.".$type,$length); //大頭像
$thumbname02 = substr_replace($image,"02.".$type,$length); //小頭像
$imageFun($thumbImg,$thumbname01,100);
$imageFun($thumbImg,$thumbname02,100);
$thumbImg01 = imagecreatetruecolor(190,195);
imagecopyresampled($thumbImg01,$thumbImg,0,0,$_POST['x'],$_POST['y'],190,195,$_POST['w'],$_POST['h']);
$thumbImg02 = imagecreatetruecolor(48,48);
imagecopyresampled($thumbImg02,$thumbImg,0,0,$_POST['x'],$_POST['y'],48,48,$_POST['w'],$_POST['h']);
$imageFun($thumbImg01,$thumbname01,100);
$imageFun($thumbImg02,$thumbname02,100);
// unlink($image);
imagedestroy($thumbImg01);
imagedestroy($thumbImg02);
imagedestroy($thumbImg);
imagedestroy($srcImg);
return array('big' => $thumbname01 , 'small' => $thumbname02); //返回包含大小頭像路徑的數組
}else{
if($is_save == false){ //縮略圖覆蓋原圖，縮略圖的路徑還是原圖路徑
$imageFun($thumbImg,$image,100);
}else{
$thumbname03 = substr_replace($image,"03.".$type,$length); //縮略圖與原圖同時存在，
$imageFun($thumbImg,$thumbname03,100);
imagedestroy($thumbImg);
imagedestroy($srcImg);
return $thumbname03 ; //返回縮略圖的路徑，字符串
}
}
}
return false;
}
}
以上就是本文的全部內容，希望對大家學習php程序設計有所幫助。
