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PHP上传、生成缩略图、生成文字水印和图片水印
<?php
/*
'-##########################################-|
'|     程序设计:(绿竹居)                |
'|     MSN:[email]lzj_zhangjun@hotmail.com[/email]         |
'|     Email:cszjun@gmail.com              |
'|     结合自己以前做的上传和生成缩略和改编一个
'|     老前辈的生成图片水印做成这个                 |
'|     上传+生成缩略图+生成文字水印和图片水印      |
'|     可以直接引用                             |
'-##########################################-|
*/
//审明图片文件夹
$bigfolder="img";
$smallfolder="smallimg";
//审明文件夹名称 以年月日来建议文件夹
$fdate=date("Ymd");
//echo $fdate;
//审明文件名称。以年月日时分秒命名
$fname=date("YmdHis");
$bigname="0724e_com_".$fname;
$smallname="0724e_com_".$fname."_s";
//echo $fname."<br/>".$bigname."<br/>".$smallname;
//确定大小文件夹的名称和路经
$bigaddrname=$bigfolder."/".$fdate."/".$bigname;
$smalladdrname=$smallfolder."/".$fdate."/".$smallname;
//审明小图片的高度和宽度
$RESIZEWIDTH=180; 
$RESIZEHEIGHT=150;
//审明水印的文字或图片的地址及字体的地址
$imgaddr="img.jpg";    //图片水印
$fontname="www.0724e.com";  //文字水印
//充许上传的文件扩展名
$exit_name=array(".jpg",".gif",".png");
if (isset($_POST['Submit'])){
//上传部分----------------------------
//定议上传名称和上传错误
$upfile=$_FILES['image']['name'];
$uperror=$_FILES['image']['error'];
//最简表单验证

switch ($uperror) {
  case 1:
      die("<div align="center">上传真过PHP设置充许的最大值<a href="javascript:history.back();">点击返回</a></div>");
  break;
  case 2:
   die("<div align="center">上传超过了表单充许的最大值<a href="javascript:history.back();">点击返回</a></div>");
  break; 
  case 3:
   die("<div align="center">文件只有部分被上传了<a href="javascript:history.back();">点击返回</a></div>");
     break;
  case 4:
   die("<div align="center">文件不有被上传<a href="javascript:history.back();">点击返回</a></div>");
     break;
}

//检测扩展是否是充许上传的文件类型
//取得文件扩展名
$exname=strrchr($upfile,".");
//判断取得扩展名是否在要求的扩展名内
if(!in_array($exname,$exit_name))
die("<div align="center">文件扩展名不对。只允许上传jpg gif png的图片<a href="javascript:history.back();">点击返回</a></div>");

//检测存放图片的目录和子目录是否存在,如果不存在则建目录和子目录,并给目录最大权限777 对LINUX或unix对WINDOWS没必要
//大图
if (!file_exists($bigfolder)){
  mkdir($bigfolder,0777);
  mkdir($bigfolder."/".$fdate,0777);
}else{
  if (!file_exists($bigfolder."/".$fdate)){
   mkdir($bigfolder."/".$fdate,0777);
  }
}
//缩略图
if (!file_exists($smallfolder)){
  mkdir($smallfolder,0777);
  mkdir($smallfolder."/".$fdate,0777); 
}else{
  if (!file_exists($smallfolder."/".$fdate)){
  mkdir($smallfolder."/".$fdate,0777); 
  }
}
//创建目录结束

//得到临时上传的文件
$upfiletmp=$_FILES['image']['tmp_name'];
//判断临时文件是否存在
if ($uperror==6)
die("<div align="center">找不到临时上传文件,上传失败<a href="javascript:history.back();">点击返回</a></div>");

//水印部分==========================================
//水印函数开始============
/**      $groundImage    背景图片,即需要加水印的图片,暂只支持GIF,JPG,PNG格式; 
*      $waterPos       水印位置,有10种状态,0为随机位置; 
*                      1为顶端居左,2为顶端居中,3为顶端居右; 
*                      4为中部居左,5为中部居中,6为中部居右; 
*                      7为底端居左,8为底端居中,9为底端居右; 
*      $waterImage     图片水印,即作为水印的图片,暂只支持GIF,JPG,PNG格式; 
*      $waterText      文字水印,即把文字作为为水印,支持ASCII码,不支持中文; 
*      $textFont       文字大小,值为1、2、3、4或5,默认为5; 
*      $textColor      文字颜色,值为十六进制颜色值,默认为#FF0000(红色); 
* */

function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="", $textFont=5,$textColor="#FF0000") 
{ 
    $isWaterImage = FALSE; 
    $formatMsg = "暂不支持该文件格式,请用图片处理软件将图片转换为GIF、JPG、PNG格式。"; 

    //读取水印文件 
    if(!empty($waterImage) && file_exists($waterImage)) { 
        $isWaterImage = TRUE; 
        $water_info = getimagesize($waterImage); 
        $water_w    = $water_info[0];//取得水印图片的宽 
        $water_h    = $water_info[1];//取得水印图片的高 

        switch($water_info[2])  {   //取得水印图片的格式  
            case 1:$water_im = imagecreatefromgif($waterImage);break; 
            case 2:$water_im = imagecreatefromjpeg($waterImage);break; 
            case 3:$water_im = imagecreatefrompng($waterImage);break; 
            default:die($formatMsg); 
        } 
    } 

    //读取背景图片 
    if(!empty($groundImage) && file_exists($groundImage)) { 
        $ground_info = getimagesize($groundImage); 
        $ground_w    = $ground_info[0];//取得背景图片的宽 
        $ground_h    = $ground_info[1];//取得背景图片的高 

        switch($ground_info[2]) {   //取得背景图片的格式  
            case 1:$ground_im = imagecreatefromgif($groundImage);break; 
            case 2:$ground_im = imagecreatefromjpeg($groundImage);break; 
            case 3:$ground_im = imagecreatefrompng($groundImage);break; 
            default:die($formatMsg); 
        } 
    } else { 
        die("需要加水印的图片不存在!"); 
    } 

    //水印位置 
    if($isWaterImage) { //图片水印  
        $w = $water_w; 
        $h = $water_h; 
        $label = "图片的"; 
    } else {  //文字水印 
        $temp = imagettfbbox(ceil($textFont*2.5),0,"./cour.ttf",$waterText);//取得使用 TrueType 字体的文本的范围 
        $w = $temp[2] - $temp[6]; 
        $h = $temp[3] - $temp[7]; 
        unset($temp); 
        $label = "文字区域"; 
    } 
    if( ($ground_w<$w) || ($ground_h<$h) ) { 
        echo "需要加水印的图片的长度或宽度比水印".$label."还小,无法生成水印!"; 
        return; 
    } 
    switch($waterPos) { 
        case 0://随机 
            $posX = rand(0,($ground_w - $w)); 
            $posY = rand(0,($ground_h - $h)); 
            break; 
        case 1://1为顶端居左 
            $posX = 0; 
            $posY = 0; 
            break; 
        case 2://2为顶端居中 
            $posX = ($ground_w - $w) / 2; 
            $posY = 0; 
            break; 
        case 3://3为顶端居右 
            $posX = $ground_w - $w; 
            $posY = 0; 
            break; 
        case 4://4为中部居左 
            $posX = 0; 
            $posY = ($ground_h - $h) / 2; 
            break; 
        case 5://5为中部居中 
            $posX = ($ground_w - $w) / 2; 
            $posY = ($ground_h - $h) / 2; 
            break; 
        case 6://6为中部居右 
            $posX = $ground_w - $w; 
            $posY = ($ground_h - $h) / 2; 
            break; 
        case 7://7为底端居左 
            $posX = 0; 
            $posY = $ground_h - $h; 
            break; 
        case 8://8为底端居中 
            $posX = ($ground_w - $w) / 2; 
            $posY = $ground_h - $h; 
            break; 
        case 9://9为底端居右 
            $posX = $ground_w - $w; 
            $posY = $ground_h - $h; 
            break; 
        default://随机 
            $posX = rand(0,($ground_w - $w)); 
            $posY = rand(0,($ground_h - $h)); 
            break;     
    } 

    //设定图像的混色模式 
    imagealphablending($ground_im, true); 

    if($isWaterImage) { //图片水印 
        imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件         
    } else {//文字水印
        if( !empty($textColor) && (strlen($textColor)==7) ) { 
            $R = hexdec(substr($textColor,1,2)); 
            $G = hexdec(substr($textColor,3,2)); 
            $B = hexdec(substr($textColor,5)); 
        } else { 
            die("水印文字颜色格式不正确!"); 
        } 
        imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));         
    } 

    //生成水印后的图片 
    @unlink($groundImage); 
    switch($ground_info[2]) {//取得背景图片的格式 
        case 1:imagegif($ground_im,$groundImage);break; 
        case 2:imagejpeg($ground_im,$groundImage);break; 
        case 3:imagepng($ground_im,$groundImage);break; 
        default:die($errorMsg); 
    } 

    //释放内存 
    if(isset($water_info)) unset($water_info); 
    if(isset($water_im)) imagedestroy($water_im); 
    unset($ground_info); 
    imagedestroy($ground_im); 
} 
//水印函数完


//存在则移动完在上传
$goodupfile=@move_uploaded_file($upfiletmp,$bigaddrname.$exname);
if (!$goodupfile){
die("<div align="center">上传图片失败<a href="javascript:history.back();">点击返回</a></div>");
}else{ 
  
//文字水印 
    imageWaterMark($bigaddrname.$exname,5,"",$fontname,5,"#FF0000"); 

    //图片水印 
    //imageWaterMark($bigaddrname.$exname,5,$imgaddr); 
//结束水印部分===================================
    

//缩略图部分------------------------------------------------------------
//判断缩略图大小函数-----
    function ResizeImage($im,$maxwidth,$maxheight,$name){ 
    $width = imagesx($im); 
    $height = imagesy($im); 
    if(($maxwidth && $width > $maxwidth) || ($maxheight && $height > $maxheight)){ 
        if($maxwidth && $width > $maxwidth){ 
            $widthratio = $maxwidth/$width; 
            $RESIZEWIDTH=true; 
        } 
        if($maxheight && $height > $maxheight){ 
            $heightratio = $maxheight/$height; 
            $RESIZEHEIGHT=true; 
        } 
        if($RESIZEWIDTH && $RESIZEHEIGHT){ 
            if($widthratio < $heightratio){ 
                $ratio = $widthratio; 
            }else{ 
                $ratio = $heightratio; 
            } 
        }elseif($RESIZEWIDTH){ 
            $ratio = $widthratio; 
        }elseif($RESIZEHEIGHT){ 
            $ratio = $heightratio; 
        } 
        $newwidth = $width * $ratio; 
        $newheight = $height * $ratio; 
        if(function_exists("imagecopyresampled")){ 
              $newim = imagecreatetruecolor($newwidth, $newheight); 
              imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
        }else{ 
            $newim = imagecreate($newwidth, $newheight); 
              imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
        } 
        ImageJpeg ($newim,$smalladdrname.$name.".jpg"); 
        ImageDestroy ($newim); 
    }else{ 
        ImageJpeg ($im,$smalladdrname.$name.".jpg"); 
    } 
    } 
    //生成部分
    if($_FILES['image']['size']){ 
    if($_FILES['image']['type'] == "image/pjpeg"){ 
        $im = imagecreatefromjpeg($bigaddrname.$exname); 
    }elseif($_FILES['image']['type'] == "image/x-png"){ 
        $im = imagecreatefrompng($bigaddrname.$exname); 
    }elseif($_FILES['image']['type'] == "image/gif"){ 
        $im = imagecreatefromgif($bigaddrname.$exname); 
    } 
    if($im){ 
        if(file_exists($smalladdrname.".jpg")){ 
            unlink($smalladdrname.".jpg"); 
        } 
        ResizeImage($im,$RESIZEWIDTH,$RESIZEHEIGHT,$smalladdrname); 
        ImageDestroy ($im); 
    } 
    }
    echo "<div align='center'><a href='javascript:window.history.back()'>上传成功</a></div>";
}
//缩略图结束----------------------------------------------------- 
  
}
?>
<form action="" method="post" enctype="multipart/form-data" name="form1" id="form1">
  <input type="file" name="image" />
  <input type="hidden" name="MAX_FILE_SIZE" value="<?=1024*100?>">
  <input type="submit" name="Submit" value="上传图片" />
</form>

 

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