- php教程首页
- php图像处理
Php上传、生成缩略图、生成文字水印和图片水印
•php图像处理•阅读 532 - <?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=\"java script: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=\"java script: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=\"java script:history.back();\">点击返回</a></div>");
- break;
- case 4:
- die("<div align=\"center\">文件不有被上传<a href=\"java script: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=\"java script: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=\"java script: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;
- $formatMsg = "暂不支持该文件格式,请用图片处理软件将图片转换为GIF、JPG、PNG格式。";
- //读取水印文件
- if(!emptyempty($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($formatMsg);
- }
- }
- //读取背景图片
- if(!emptyempty($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( !emptyempty($textColor) && (strlen($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 (!$goodupfile){
- die("<div align=\"center\">上传图片失败<a href=\"java script:history.back();\">点击返回</a></div>");
- }else{
- //文字水印
- imageWaterMark($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='java script:window.history.back()'>上传成功</a></div>";
- }
- //缩略图结束-----------------------------------------------------
- }
- ?>
- <form action="" method="post" enctype="multipart/form-data" name="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>