php的图片上传类-带水印及缩略图
一个非常好的PHP图片上传类，支持生成缩略图，支持添加水印。
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
<?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
<?php $annexFolder = "annex"; $smallFolder = "smallimg"; $markFolder = "mark"; $includeFolder = "include"; require("./".$includeFolder."/upfile.php"); $img = new UPImages($annexFolder,$smallFolder,$includeFolder); $text = array("www.goldtimes.net","all rights reserved"); if(@$_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,$text); echo "<img src='http://blog.163.com/kong_qing_feng/blog/".$newSmallImg."' border='0'><br><br>"; echo "<img src='http://blog.163.com/kong_qing_feng/blog/".$newMark."' border='0'><br><br>"; echo "<a href='http://blog.163.com/kong_qing_feng/blog/./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 } ?> 
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