php 圖片上傳類代碼

先來個簡單的：
復制代碼 代碼如下:
<?
//http://www.jb51.net
class upLoad{
public $length; //限定文件大小
public $file; //判斷此類是用於圖片上傳還是文件上傳
public $fileName; //文件名
public $fileTemp; //上傳臨時文件
public $fileSize; //上傳文件大小
public $error; //上傳文件是否有錯,php4沒有
public $fileType; //上傳文件類型
public $directory; //
public $maxLen;
public $errormsg;
function __construct($length,$file=true,$directory)
{
$this->maxLen=$length;
$this->length=$length*1024;
$this->file=$file; //true為一般文件，false為圖片的判斷
$this->directory=$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) //一般文件上傳
{
$path = $this->_isCreatedDir($this->directory);//取得路徑
if($path)//http://www.jb51.net
{
$createFileType = $this->_getFileType($this->fileName);//設置文件類別
$createFileName=uniqid(rand()); //隨機產生文件名
$thisDir=$this->directory.$pathSign.$createFileName.".".$createFileType;
if(@move_uploaded_file($this->fileTemp,$thisDir)) //把臨時文件移動到規定的路徑下
{
return $thisDir;
}
}
}else{ //圖片上傳
$path = $this->_isCreatedDir($this->directory);//取得路徑
if($path)//路徑存在//http://www.jb51.net
{
$createFileType = $this->_getFileType($this->fileName);//設置文件類別
$createFileName=uniqid(rand());
return @move_uploaded_file($this->fileTemp,$this->directory.$pathSign.$createFileName.".".$createFileType) ? true : false;
}
}
}
public function _isBig($length,$fsize) //返回文件是否超過規定大小
{
return $fsize>$length ? true : false;
}
public function _getFileType($fileName) //獲得文件的後綴
{
return end(explode(".",$fileName));
}
public function _isImg($fileType) //上傳圖片類型是否允許
{
$type=array("jpeg","gif","jpg","bmp");
$fileType=strtolower($fileType);
$fileArray=explode("/",$fileType);
$file_type=end($fileArray);
return in_array($file_type,$type);//http://www.jb51.net
}
public function _isCreatedDir($path) //路徑是否存在，不存在就創建
{
if(!file_exists($path))
{
return @mkdir($path,0755)?true:false; //權限755//
}
else
{
return true;
}
}
public function showError() //顯示錯誤信息
{//http://www.jb51.net
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()||$this->_judge()=="no") //文件全部符合規格,就開始上傳
{
foreach($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="文件超過 $this->maxLen K";
parent::showError();
}
if($value['error']=UPLOAD_ERR_NO_FILE)
{
//$this->errormsg="上傳文件出現錯誤";
//parent::showError();
return "no";
}
}
return true;
}else
{
//http://www.jb51.net
foreach($this->FILES as $key=>$value)
{
if($this->_isBig($this->length,$value['size']))
{
$this->errormsg="圖片超過$this->maxLen";
parent::showError();
}
if($value['error']!=0)
{
$this->errormsg="上傳圖片出現錯誤";
parent::showError();
}
if(!$this->_isImg($value['type']))
{
$this->errormsg="圖片格式不對";
parent::showError();
}
}
return true;
}
}
}
?>

再來個復雜點的，可以自動生成縮略圖的功能的php上傳類
開始第一步：
創建文件夾，布局：
annex：附件（該目錄下存放上傳的原圖片）
|— smallimg：存放縮略圖片
|— mark：存放水印圖片
include：存放類文件，字體（本程序代碼使用的是：04B_08__.TTF）
|— upfile.php：集成簡單上傳，生成縮略圖及水印的類文件信息
|— 04B_08__.TTF：字體文件
test.php：測試文件
第二步上傳類
upfile.php
復制代碼 代碼如下:
<?php
class UPImages {
var $annexFolder = "annex";//附件存放點，默認為：annex
var $smallFolder = "smallimg";//縮略圖存放路徑，注：必須是放在 $annexFolder下的子目錄，默認為：smallimg
var $markFolder = "mark";//水印圖片存放處
var $upFileType = "jpg gif png";//上傳的類型，默認為：jpg gif png rar zip
var $upFileMax = 1024;//上傳大小限制，單位是“KB”，默認為：1024KB
var $fontType;//字體
var $maxWidth = 500; //圖片最大寬度
var $maxHeight = 600; //圖片最大高度
function UPImages($annexFolder,$smallFolder,$includeFolder) {
$this->annexFolder = $annexFolder;
$this->smallFolder = $smallFolder;
$this->fontType = $includeFolder."/04B_08__.TTF";
}
function upLoad($inputName) {
$imageName = time();//設定當前時間為圖片名稱
if(@empty($_FILES[$inputName]["name"])) die(error("沒有上傳圖片信息，請確認"));
$name = explode(".",$_FILES[$inputName]["name"]);//將上傳前的文件以“.”分開取得文件類型
$imgCount = count($name);//獲得截取的數量
$imgType = $name[$imgCount-1];//取得文件的類型
if(strpos($this->upFileType,$imgType) === false) die(error("上傳文件類型僅支持 ".$this->upFileType." 不支持 ".$imgType));
$photo = $imageName.".".$imgType;//寫入數據庫的文件名
$uploadFile = $this->annexFolder."/".$photo;//上傳後的文件名稱
$upFileok = move_uploaded_file($_FILES[$inputName]["tmp_name"],$uploadFile);
if($upFileok) {
$imgSize = $_FILES[$inputName]["size"];
$kSize = round($imgSize/1024);
if($kSize > ($this->upFileMax*1024)) {
@unlink($uploadFile);
die(error("上傳文件超過 ".$this->upFileMax."KB"));
}
} else {
die(error("上傳圖片失敗，請確認你的上傳文件不超過 $upFileMax KB 或上傳時間超時"));
}
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;//獲得圖片源
$newName = substr($imgInfo["name"],0,strrpos($imgInfo["name"], "."))."_thumb.jpg";//新圖片名稱
if($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：測試上傳類
test.php
復制代碼 代碼如下:
<?php
$annexFolder = "annex";
$smallFolder = "smallimg";
$markFolder = "mark";
$includeFolder = "include";
require("./".$includeFolder."/upfile.php");
$img = new UPImages($annexFolder,$smallFolder,$includeFolder);
$text = array("www.jb51.net","all rights reserved");
if(@$_GET["go"]) {
$photo = $img->upLoad("upfile");
$img->maxWidth = $img->maxHeight = 350;//設置生成水印圖像值
$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'>繼續上傳</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="上傳">
</form>
<?php
}
?>