Php上傳、產生縮圖、產生文字浮水印和圖片浮水印_PHP教程

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/*
'-##########################################-|
'| 程式設計:(綠竹居) |
'| MSN:[email]lzj_zhangjun@hotmail.com[/email] |
'| Email:cszjun@gmail.com |
'| 結合自己以前做的上傳和產生縮減和改編一個
'| 老前輩的產生圖片浮水印做成這個 |
'| 上傳+產生縮圖+產生文字浮水印和圖片浮水印 |
'| 可以直接引用 |
'-##########################################-|
*/
//審明圖片檔案夾
$bigfolder="img";
$smallfolder="smallimg";
//審明檔案夾名稱 以年月日來建議檔案夾
$fdate=date("Ymd");
//echo $fdate;
//審明檔案名稱。以年月日時分秒命名
$fname=date("YmdHis");
$bigname="0724e_com_".$fname;
$smallname="0724e_com_".$fname."_s";
//echo $fname."
".$bigname."
".$smallname;
//確定大小檔案夾的名稱和路經
$bigaddrname=$bigfolder."/".$fdate."/".$bigname;
$smalladdrname=$smallfolder."/".$fdate."/".$smallname;
//審明小圖片的高度和寬度
$RESIZEWIDTH=180;
$RESIZEHEIGHT=150;
//審明浮水印的文字或圖片的地址及字型的地址
$imgaddr="img.jpg"; //圖片浮水印
$fontname="www.0724e.com"; //文字浮水印
//充許上傳的副檔名
$exit_name=array(".jpg",".gif",".png");
if (isset($_POST['Submit'])){
//上傳部分----------------------------
//定議上傳名稱和上傳錯誤
$upfile=$_FILES['image']['name'];
$uperror=$_FILES['image']['error'];
//最簡表單驗證

switch ($uperror) {
case 1:
die("上傳真過PHP設定充許的最大值點擊返回");
break;
case 2:
die("上傳超過了表單充許的最大值點擊返回");
break;
case 3:
die("檔案只有部分被上傳了點擊返回");
break;
case 4:
die("檔案不有被上傳點擊返回");
break;
}

//檢測擴充是否是充許上傳的檔案類型
//取得副檔名
$exname=strrchr($upfile,".");
//判斷取得副檔名是否在要求的副檔名內
if(!in_array($exname,$exit_name))
die("副檔名不對。只允許上傳jpg gif png的圖片點擊返回");

//檢測存放圖片的目錄和子目錄是否存在,如果不存在則建目錄和子目錄,並給目錄最大許可權777 對LINUX或unix對WINDOWS沒必要
//大圖
if (!file_exists($bigfolder)){
mkdir($bigfolder,0777);
mkdir($bigfolder."/".$fdate,0777);
}else{
if (!file_exists($bigfolder."/".$fdate)){
mkdir($bigfolder."/".$fdate,0777);
}
}
//縮圖
if (!file_exists($smallfolder)){
mkdir($smallfolder,0777);
mkdir($smallfolder."/".$fdate,0777);
}else{
if (!file_exists($smallfolder."/".$fdate)){
mkdir($smallfolder."/".$fdate,0777);
}
}
//建立目錄結束

//得到臨時上傳的檔案
$upfiletmp=$_FILES['image']['tmp_name'];
//判斷臨時檔案是否存在
if ($uperror==6)
die("找不到臨時上傳檔案,上傳失敗點擊返回");

//浮水印部分==========================================
//浮水印函數開始============
/** $groundImage 背景圖片,即需要加浮水印的圖片,暫只支援GIF,JPG,PNG格式;
* $waterPos 浮水印位置,有10種狀態,0為隨機位置;
* 1為頂端居左,2為頂端置中,3為頂端居右;
* 4為中部居左,5為中部置中,6為中部居右;
* 7為底端居左,8為底端置中,9為底端居右;
* $waterImage 圖片浮水印,即作為浮水印的圖片,暫只支援GIF,JPG,PNG格式;
* $waterText 文字浮水印,即把文字作為為浮水印,支援ASCII碼,不支援中文;
* $textFont 文字大小,值為1、2、3、4或5,預設為5;
* $textColor 文字顏色,值為十六進位顏色值,預設為#FF0000(紅色);
* */

function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="", $textFont=5,$textColor="#FF0000")
{
$isWaterImage = FALSE;
$formatMsg = "暫不支援該檔案格式,請用圖片處理軟體將圖片轉換為GIF、JPG、PNG格式。";

//讀取浮水印檔案
if(!empty($waterImage) && file_exists($waterImage)) {
$isWaterImage = TRUE;
$water_info = getimagesize($waterImage);
$water_w = $water_info[0];//取得浮水印圖片的寬
$water_h = $water_info[1];//取得浮水印圖片的高

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

//讀取背景圖片
if(!empty($groundImage) && file_exists($groundImage)) {
$ground_info = getimagesize($groundImage);
$ground_w = $ground_info[0];//取得背景圖片的寬
$ground_h = $ground_info[1];//取得背景圖片的高

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

//浮水印位置
if($isWaterImage) { //圖片浮水印
$w = $water_w;
$h = $water_h;
$label = "圖片的";
} else { //文字浮水印
$temp = imagettfbbox(ceil($textFont*2.5),0,"./cour.ttf",$waterText);//取得使用 TrueType 字型的文本的範圍
$w = $temp[2] - $temp[6];
$h = $temp[3] - $temp[7];
unset($temp);
$label = "文字地區";
}
if( ($ground_w<$w) || ($ground_h<$h) ) {
echo "需要加浮水印的圖片的長度或寬度比浮水印".$label."還小,無法產生浮水印!";
return;
}
switch($waterPos) {
case 0://隨機
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;
case 1://1為頂端居左
$posX = 0;
$posY = 0;
break;
case 2://2為頂端置中
$posX = ($ground_w - $w) / 2;
$posY = 0;
break;
case 3://3為頂端居右
$posX = $ground_w - $w;
$posY = 0;
break;
case 4://4為中部居左
$posX = 0;
$posY = ($ground_h - $h) / 2;
break;
case 5://5為中部置中
$posX = ($ground_w - $w) / 2;
$posY = ($ground_h - $h) / 2;
break;
case 6://6為中部居右
$posX = $ground_w - $w;
$posY = ($ground_h - $h) / 2;
break;
case 7://7為底端居左
$posX = 0;
$posY = $ground_h - $h;
break;
case 8://8為底端置中
$posX = ($ground_w - $w) / 2;
$posY = $ground_h - $h;
break;
case 9://9為底端居右
$posX = $ground_w - $w;
$posY = $ground_h - $h;
break;
default://隨機
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;
}

//設定映像的混色模式
imagealphablending($ground_im, true);

if($isWaterImage) { //圖片浮水印
imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷貝浮水印到目標檔案
} else {//文字浮水印
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("浮水印文字顏色格式不正確!");
}
imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
}

//產生浮水印後的圖片
@unlink($groundImage);
switch($ground_info[2]) {//取得背景圖片的格式
case 1:imagegif($ground_im,$groundImage);break;
case 2:imagejpeg($ground_im,$groundImage);break;
case 3:imagepng($ground_im,$groundImage);break;
default:die($errorMsg);
}

//釋放記憶體
if(isset($water_info)) unset($water_info);
if(isset($water_im)) imagedestroy($water_im);
unset($ground_info);
imagedestroy($ground_im);
}
//浮水印函數完


//存在則移動完在上傳
$goodupfile=@move_uploaded_file($upfiletmp,$bigaddrname.$exname);
if (!$goodupfile){
die("上傳圖片失敗點擊返回");
}else{

//文字浮水印
imageWaterMark($bigaddrname.$exname,5,"",$fontname,5,"#FF0000");

//圖片浮水印
//imageWaterMark($bigaddrname.$exname,5,$imgaddr);
//結束浮水印部分===================================

//縮圖部分------------------------------------------------------------
//判斷縮圖大小函數-----
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");
}
}
//產生部分
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 "上傳成功";
}
//縮圖結束-----------------------------------------------------

}
?>

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