Php upload, generate thumbnails, generate text watermarks and image watermarks_PHP tutorial

/*
'-##########################################-|
'|     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 $fname."
".$bigname."
".$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("

上传真过PHP设置充许的最大值点击返回

");
  break;
  case 2:
   die("

上传超过了表单充许的最大值点击返回

");
  break;
  case 3:
   die("

文件只有部分被上传了点击返回

");
     break;
  case 4:
   die("

文件不有被上传点击返回

");
     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("

文件扩展名不对。只允许上传jpg gif png的图片点击返回

");

//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("

找不到临时上传文件，上传失败点击返回

");

//Watermark part============================================
//Start of watermark function============
/**$groundImage Background image, that is, the image that needs to be watermarked, currently only supports GIF, JPG, and PNG formats;
* $waterPos Watermark position, there are 10 states, 0 is a random position;
* 1 means the top is on the left, 2 means the top is in the center, 3 means the top is on the right;
* 4 means the middle is on the left, 5 means the middle is on the middle, 6 means the middle is on the right;
* 7 means the bottom is on the left, 8 means the bottom is in the middle, 9 means the bottom is on the right;
* $waterImage Image watermark, that is, the image used as a watermark, currently only supports GIF, JPG, and PNG formats;
* $waterText Text watermark, that is, text is used as a watermark. It supports ASCII code and does not support Chinese;
* $textFont Text size, value is 1, 2, 3, 4 or 5, default is 5;
* $textColor Text color, the value is a hexadecimal color value, the default is #FF0000 (red);
**/

function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="", $textFont=5,$textColor="#FF0000")
{
$isWaterImage = FALSE;
$formatMsg = "This file format is not supported yet. Please use image processing software to convert the image to GIF, JPG, or PNG format.";

//Read watermark file
If(!empty($waterImage) && file_exists($waterImage)) {
          $isWaterImage = TRUE;
          $water_info = getimagesize($waterImage);
                      $water_w                                                                                                                                                                                                   only                        $water_h                                                                                  
switch($water_info[2]) { //Get the format of the watermark image

               case 1:$water_im = imagecreatefromgif($waterImage);break;

               case 2:$water_im = imagecreatefromjpeg($waterImage);break;
               case 3:$water_im = imagecreatefrompng($waterImage);break;
                   default:die($formatMsg);
}
}

//Read background image

If(!empty($groundImage) && file_exists($groundImage)) {

          $ground_info = getimagesize($groundImage);
                    $ground_w                                                                                                                                                                                                           only  $ GROUND_H = $ GROUND_INFO [1]; // Give the background picture high

switch($ground_info[2]) { //Get the format of the background image
               case 1:$ground_im = imagecreatefromgif($groundImage);break;

               case 2:$ground_im = imagecreatefromjpeg($groundImage);break;

               case 3:$ground_im = imagecreatefrompng($groundImage);break;
                  default:die($formatMsg);
}
} else {
​​​​die("The picture that needs to be watermarked does not exist!");
}

//Watermark position
If($isWaterImage) { //Image watermark
          $w = $water_w;
          $h = $water_h;
          $label = "Picture";
} else { //Text watermark
$temp = imagettfbbox(ceil($textFont*2.5),0,"./cour.ttf",$waterText);//Get the range of text using TrueType font
          $w = $temp[2] - $temp[6];
          $h = $temp[3] - $temp[7];
          unset($temp);
          $label = "Text area";
}
If( ($ground_w echo "The length or width of the image that needs to be watermarked is smaller than the watermark ".$label.", so the watermark cannot be generated!";
         return;
}
switch($waterPos) {
case 0://random
                $posX = rand(0,($ground_w - $w));
                $posY = rand(0,($ground_h - $h));
             break;
case 1://1 means the top is on the left
                $posX = 0;
                $posY = 0;
             break;
​​​​​case 2://2 is top-centered
               $posX = ($ground_w - $w) / 2;
                $posY = 0;
             break;
           case 3://3 is the top right
               $posX = $ground_w - $w;
               $posY = 0;
             break;
           case 4://4 is the center on the left
                $posX = 0;
               $posY = ($ground_h - $h) / 2;
             break;
case 5://5 is centered in the middle
               $posX = ($ground_w - $w) / 2;
               $posY = ($ground_h - $h) / 2;
             break;
           case 6://6 is the center on the right
               $posX = $ground_w - $w;
              $posY = ($ground_h - $h) / 2;
             break;
case 7://7 means the bottom is on the left
                $posX = 0;
               $posY = $ground_h - $h;
             break;
          case 8://8 is the bottom center
               $posX = ($ground_w - $w) / 2;
               $posY = $ground_h - $h;
             break;
case 9://9 means the bottom is on the right
               $posX = $ground_w - $w;
               $posY = $ground_h - $h;
             break;
            default://random
                $posX = rand(0,($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("

上传图片失败点击返回

");
}else{

//Text watermark
ImageWaterMark($bigaddrname.$exname,5,"",$fontname,5,"#FF0000");

//Picture watermark
//imageWaterMark($bigaddrname.$exname,5,$imgaddr);
//End watermark part====================================

//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                 $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 "

上传成功

";
}
//End of thumbnail------------------------------------------------ --------

}
?>

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