编写还可以的php 图片上传类代码

php 图片上传类代码，功能也比较全，大家根据需要选择。

先来个简单的： 

复制代码代码如下:

<? 

//http://blog.csdn.net/enweitech

class upLoad{ 

public $length; //限定文件大小 

public $file; //判断此类是用于图片上传还是文件上传 

public $fileName; //文件名 

public $fileTemp; //上传临时文件 

public $fileSize; //上传文件大小 

public $error; //上传文件是否有错,php4没有 

public $fileType; //上传文件类型 

public $directory; // 

public $maxLen; 

public $errormsg; 

function __construct($length,$file=true,$directory) 

{ 

$this->maxLen=$length; 

$this->length=$length*1024; 

$this->file=$file; //true为一般文件，false为图片的判断 

$this->directory=$directory; 

} 

public function upLoadFile($fileField) 

{ 

$this->fileName=$fileField['name']; 

$this->fileTemp=$fileField['tmp_name']; 

$this->error=$fileField['error']; 

$this->fileType=$fileField['type']; 

$this->fileSize=$fileField['size']; 

$pathSign = DIRECTORY_SEPARATOR; // / 

if($this->file) //一般文件上传 

{ 

$path = $this->_isCreatedDir($this->directory);//取得路径 

if($path)//http://blog.csdn.net/enweitech

{ 

$createFileType = $this->_getFileType($this->fileName);//设置文件类别 

$createFileName=uniqid(rand()); //随机产生文件名 

$thisDir=$this->directory.$pathSign.$createFileName.".".$createFileType; 

if(@move_uploaded_file($this->fileTemp,$thisDir)) //把临时文件移动到规定的路径下 

{ 

return $thisDir; 

} 

} 

}else{ //图片上传 

$path = $this->_isCreatedDir($this->directory);//取得路径 

if($path)//路径存在//http://blog.csdn.net/enweitech

{ 

$createFileType = $this->_getFileType($this->fileName);//设置文件类别 

$createFileName=uniqid(rand()); 

return @move_uploaded_file($this->fileTemp,$this->directory.$pathSign.$createFileName.".".$createFileType) ? true : false; 

} 

} 

} 

public function _isBig($length,$fsize) //返回文件是否超过规定大小 

{ 

return $fsize>$length ? true : false; 

} 

public function _getFileType($fileName) //获得文件的后缀 

{ 

return end(explode(".",$fileName)); 

} 

public function _isImg($fileType) //上传图片类型是否允许 

{ 

$type=array("jpeg","gif","jpg","bmp"); 

$fileType=strtolower($fileType); 

$fileArray=explode("/",$fileType); 

$file_type=end($fileArray); 

return in_array($file_type,$type);//http://blog.csdn.net/enweitech

} 

public function _isCreatedDir($path) //路径是否存在，不存在就创建 

{ 

if(!file_exists($path)) 

{ 

return @mkdir($path,0755)?true:false; //权限755// 

} 

else 

{ 

return true; 

} 

} 

public function showError() //显示错误信息 

{//http://blog.csdn.net/enweitech

echo "<Script Language ='JavaScript'>\n history.back();\n alert(' $this->errormsg');\n </Script> \n"; 

exit(); 

} 

} 

class multiUpLoad extends upLoad{ 

public $FILES; 

function __construct($arrayFiles,$length,$file=true,$directory) 

{ 

$this->FILES=$arrayFiles; 

parent::__construct($length,$file,$directory); 

} 

function upLoadMultiFile() 

{ 

$arr=array(); 

if($this->_judge()||$this->_judge()=="no") //文件全部符合规格,就开始上传 

{ 

foreach($this->FILES as $key=>$value) 

{ 

$strDir=parent::upLoadFile($this->FILES[$key]); 

array_push($arr, $strDir); 

} 

//http://www.jb51.net 

return $arr; 

}else 

{ 

return false; 

} 

} 

function _judge() 

{ 

if($this->file) 

{ 

foreach($this->FILES as $key=>$value) 

{ 

if($this->_isBig($this->length,$value['size'])) 

{ 

$this->errormsg="文件超过 $this->maxLen K"; 

parent::showError(); 

} 

if($value['error']=UPLOAD_ERR_NO_FILE) 

{ 

//$this->errormsg="上传文件出现错误"; 

//parent::showError(); 

return "no"; 

} 

} 

return true; 

}else 

{ 

//http://blog.csdn.net/enweitech

foreach($this->FILES as $key=>$value) 

{ 

if($this->_isBig($this->length,$value['size'])) 

{ 

$this->errormsg="图片超过$this->maxLen"; 

parent::showError(); 

} 

if($value['error']!=0) 

{ 

$this->errormsg="上传图片出现错误"; 

parent::showError(); 

} 

if(!$this->_isImg($value['type'])) 

{ 

$this->errormsg="图片格式不对"; 

parent::showError(); 

} 

} 

return true; 

} 

} 

} 

?> 

再来个复杂点的，可以自动生成缩略图的功能的php上传类 

开始第一步： 

创建文件夹，布局： 

annex：附件（该目录下存放上传的原图片） 

|— smallimg：存放缩略图片 

|— mark：存放水印图片 

include：存放类文件，字体（本程序代码使用的是：04B_08__.TTF） 

|— upfile.php：集成简单上传，生成缩略图及水印的类文件信息 

|— 04B_08__.TTF：字体文件 

test.php：测试文件 
第二步上传类 

upfile.php 

复制代码代码如下:

<?php 

class UPImages { 

var $annexFolder = "annex";//附件存放点，默认为：annex 

var $smallFolder = "smallimg";//缩略图存放路径，注：必须是放在 $annexFolder下的子目录，默认为：smallimg 

var $markFolder = "mark";//水印图片存放处 

var $upFileType = "jpg gif png";//上传的类型，默认为：jpg gif png rar zip 

var $upFileMax = 1024;//上传大小限制，单位是“KB”，默认为：1024KB 

var $fontType;//字体 

var $maxWidth = 500; //图片最大宽度 

var $maxHeight = 600; //图片最大高度 

function UPImages($annexFolder,$smallFolder,$includeFolder) { 

$this->annexFolder = $annexFolder; 

$this->smallFolder = $smallFolder; 

$this->fontType = $includeFolder."/04B_08__.TTF"; 

} 

function upLoad($inputName) { 

$imageName = time();//设定当前时间为图片名称 

if(@empty($_FILES[$inputName]["name"])) die(error("没有上传图片信息，请确认")); 

$name = explode(".",$_FILES[$inputName]["name"]);//将上传前的文件以“.”分开取得文件类型 

$imgCount = count($name);//获得截取的数量 

$imgType = $name[$imgCount-1];//取得文件的类型 

if(strpos($this->upFileType,$imgType) === false) die(error("上传文件类型仅支持 ".$this->upFileType." 不支持 ".$imgType)); 

$photo = $imageName.".".$imgType;//写入数据库的文件名 

$uploadFile = $this->annexFolder."/".$photo;//上传后的文件名称 

$upFileok = move_uploaded_file($_FILES[$inputName]["tmp_name"],$uploadFile); 

if($upFileok) { 

$imgSize = $_FILES[$inputName]["size"]; 

$kSize = round($imgSize/1024); 

if($kSize > ($this->upFileMax*1024)) { 

@unlink($uploadFile); 

die(error("上传文件超过 ".$this->upFileMax."KB")); 

} 

} else { 

die(error("上传图片失败，请确认你的上传文件不超过 $upFileMax KB 或上传时间超时")); 

} 

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;//获得图片源 

$newName = substr($imgInfo["name"],0,strrpos($imgInfo["name"], "."))."_thumb.jpg";//新图片名称 

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; 

} 

} 

?> 

第三步：测试上传类 

test.php 

复制代码代码如下:

<?php 

$annexFolder = "annex"; 

$smallFolder = "smallimg"; 

$markFolder = "mark"; 

$includeFolder = "include"; 

require("./".$includeFolder."/upfile.php"); 

$img = new UPImages($annexFolder,$smallFolder,$includeFolder); 

$text = array("blog.csdn.net/enweitech","all rights reserved"); 

if(@$_GET["go"]) { 

$photo = $img->upLoad("upfile"); 

$img->maxWidth = $img->maxHeight = 350;//设置生成水印图像值 

$img->toFile = true; 

$newSmallImg = $img->smallImg($photo); 

$newMark = $img->waterMark($photo,$text); 

echo "<img src='".$newSmallImg."' border='0'><br><br>"; 

echo "<img src='".$newMark."' border='0'><br><br>"; 

echo "<a href='./test.php'>继续上传</a>"; 

} else { 

?> 

<form method="post" action="./test.php?go=go" enctype="multipart/form-data"> 

<input type="file" name="upfile"><br><br> 

<input type="submit" value="上传"> 

</form> 

<?php 

} 

?>