PHP is very powerful and uses a very simple PHP upload class_PHP tutorial

uploading.class.php Uploading class

class UpImages {
var $annexFolder = "upload";//Attachment storage point, the default is: annex
var $smallFolder = "small";// Thumbnail storage path, note: must be placed in a subdirectory under $annexFolder, the default is: smallimg
var $markFolder = "mark";//Watermark image storage location
var $upFileType = "jpg gif png ";//Upload type, the default is: jpg gif png rar zip
var $upFileMax = 1024;//Upload size limit, the unit is "KB", the default is: 1024KB
var $fontType;// Font
var $maxWidth = 500; //Maximum image width
var $maxHeight = 600; //Maximum image height
function UpImages($annexFolder,$smallFolder,$includeFolder) {
$this ->annexFolder = $annexFolder;
$this->smallFolder = $smallFolder;
$this->fontType = $includeFolder."/04B_08__.TTF";
}
function upLoad ($inputName) {
$imageName = time();//Set the current time as the image name
if(@empty($_FILES[$inputName]["name"])) die("Not uploaded Image information, please confirm");
$name = explode(".",$_FILES[$inputName]["name"]);//Separate the files before uploading with "." to obtain the file type
$imgCount = count($name);//Get the intercepted number
$imgType = $name[$imgCount-1];//Get the file type
if(strpos($this->upFileType ,$imgType) === false) die(error("The upload file type only supports ".$this->upFileType." and does not support ".$imgType));
$photo = $imageName."." .$imgType;//The file name written to the database
$uploadFile = $this->annexFolder."/".$photo;//The uploaded file name
$upFileok = move_uploaded_file($_FILES[ $inputName]["tmp_name"],$uploadFile);
if($upFileok) {
$imgSize = $_FILES[$inputName]["size"];
$kSize = round($imgSize /1024);
if($kSize > ($this->upFileMax*1024)) {
@unlink($uploadFile);
die(error("The uploaded file exceeds".$this ->upFileMax."KB"));
}
} else {
die(error("Failed to upload image, please make sure your uploaded file does not exceed $upFileMax KB or the upload time has timed out") );
}
return $photo;
}
function getInfo($photo) {
$photo = $this->annexFolder."/".$photo;
$imageInfo = getimagesize($photo);
$imgInfo["width"] = $imageInfo[0];
$imgInfo["height"] = $imageInfo[1];
$imgInfo[" type"] = $imageInfo[2];
$imgInfo["name"] = basename($photo);
return $imgInfo;
}
function smallImg($photo,$width= 128,$height=128) {
$imgInfo = $this->getInfo($photo);
$photo = $this->annexFolder."/".$photo;//Get the image source
$newName = substr($imgInfo["name"],0,strrpos($imgInfo["name"], "."))."_thumb.jpg";//New picture name
if( $imgInfo["type"] == 1) {
$img = imagecreatefromgif($photo);
} elseif($imgInfo["type"] == 2) {
$img = imagecreatefromjpeg( $photo);
} elseif($imgInfo["type"] == 3) {
$img = imagecreatefrompng($photo);
} else {
$img = "";
}
if(empty($img)) return False;
$width = ($width > $imgInfo["width"]) ? $imgInfo["width"] : $width;
$height = ($height > $imgInfo["height"]) ? $imgInfo["height"] : $height;
$srcW = $imgInfo["width"];
$srcH = $ imgInfo["height"];
if ($srcW * $width > $srcH * $height) {
$height = round($srcH * $width / $srcW);
} else {
$width = round($srcW * $height / $srcH);
}
if (function_exists("imagecreatetruecolor")) {
$newImg = imagecreatetruecolor($width, $height);
ImageCopyResampled($newImg, $img, 0, 0, 0, 0, $width, $height, $imgInfo["width"], $imgInfo["height"]);
} else {
$newImg = imagecreate($width, $height);
ImageCopyResized($newImg, $img, 0, 0, 0, 0, $width, $height, $imgInfo["width"], $imgInfo[" height"]);
}
if ($this->toFile) {
if (file_exists($this->annexFolder."/".$this->smallFolder."/" .$newName)) @unlink($this->annexFolder."/".$this->smallFolder."/".$newName);
ImageJPEG($newImg,$this->annexFolder." /".$this->smallFolder."/".$newName);
return $this->annexFolder."/".$this->smallFolder."/".$newName;
} else {
ImageJPEG($newImg);
}
ImageDestroy($newImg);
ImageDestroy($img);
return $newName;
}
function waterMark ($photo,$text) {
$imgInfo = $this->getInfo($photo);
$photo = $this->annexFolder."/".$photo;
$newName = substr($imgInfo["name"], 0, strrpos($imgInfo["name"], ".")) . "_mark.jpg";
switch ($imgInfo["type"]) {
case 1:
$img = imagecreatefromgif($photo);
break;
case 2:
$img = imagecreatefromjpeg($photo);
break;
case 3 :
$img = imagecreatefrompng($photo);
break;
default:
return False;
}
if (empty($img)) return False;
$width = ($this->maxWidth > $imgInfo["width"]) ? $imgInfo["width"] : $this->maxWidth;
$height = ($this->maxHeight > ; $imgInfo["height"]) ? $imgInfo["height"] : $this->maxHeight;
$srcW = $imgInfo["width"];
$srcH = $imgInfo["height "];
if ($srcW * $width > $srcH * $height) {
$height = round($srcH * $width / $srcW);
}else {
$width = round($srcW * $height / $srcH);
}
if (function_exists("imagecreatetruecolor")) {
$newImg = imagecreatetruecolor($width, $height);
ImageCopyResampled($newImg, $img, 0, 0, 0, 0, $width, $height, $imgInfo["width"], $imgInfo["height"]);
} else {
$newImg = imagecreate($width, $height);
ImageCopyResized($newImg, $img, 0, 0, 0, 0, $width, $height, $imgInfo["width"], $imgInfo["height"]);
}

$white = imageColorAllocate($newImg, 255, 255, 255);
$black = imageColorAllocate($newImg, 0, 0, 0);
$alpha = imageColorAllocateAlpha($newImg, 230, 230, 230, 40);
ImageFilledRectangle($newImg, 0, $height-26, $width, $height, $alpha);
ImageFilledRectangle($newImg, 13, $height-20, 15, $height-7, $black);
ImageTTFText($newImg, 4.9, 0, 20, $height-14, $black, $this->fontType, $text[0]);
ImageTTFText($newImg, 4.9, 0, 20, $height-6, $black, $this->fontType, $text[1]);
if($this->toFile) {
if (file_exists($this->annexFolder."/".$this->markFolder."/".$newName)) @unlink($this->annexFolder."/".$this->markFolder."/".$newName);
ImageJPEG($newImg,$this->annexFolder."/".$this->markFolder."/".$newName);
return $this->annexFolder."/".$this->markFolder."/".$newName;
} else {
ImageJPEG($newImg);
}
ImageDestroy($newImg);
ImageDestroy($img);
return $newName;
}
}
?>

开始调用（使用方法）

include uploading.class.php;
$max="upload"; //文件上传路径
$mix="small"; //缩略图路径（必须在upload下建立）
$mark="mark"; //加水引的图片存放路径
$text = array("oktang","2012"); //水印内容
$img= new UpImages($max,$mix,$max); //实例化类文件
$photo = $img->upLoad("file"); //上传的文件域
$img->maxWidth = $img->maxHeight = 600; //设置高，和宽
$img->toFile = true;
$newSmallImg = $img->smallImg($photo);
$newMark = $img->waterMark($photo,$text);
echo $newSmallImg;
echo $newMark;
echo "

";
echo "

";

php 很强大使用很简单的PHP上传类，希望可以帮助大家。