两个PHP给图片加水印的代码分享
来源:互联网 发布:网络电视高清在线直播 编辑:程序博客网 时间:2024/04/27 21:58
收集的两个PHP增加图片水印的类,Michael还没进行过充分测试,有什么问题请反馈给我。
另外故人居也使用了一个Michael自己开发的增加图片水印函数,有机会一起整理出来给大家。
一、PHP给图片增加水印的类
<?php
Class Gimage{
var $src_image_name = ""; //输入图片的文件名(必须包含路径名)
var $jpeg_quality = 90; //jpeg图片质量
var $save_image_file = ''; //输出文件名
var $wm_image_name = ""; //水印图片的文件名(必须包含路径名)
var $wm_image_pos = 1; //水印图片放置的位置
// 0 = middle
// 1 = top left
// 2 = top right
// 3 = bottom right
// 4 = bottom left
// 5 = top middle
// 6 = middle right
// 7 = bottom middle
// 8 = middle left
//other = 3
var $wm_image_transition = 20; //水印图片与原图片的融合度 (1=100)
var $wm_text = ""; //水印文字(支持中英文以及带有/r/n的跨行文字)
var $wm_text_size = 20; //水印文字大小
var $wm_text_angle = 4; //水印文字角度,这个值尽量不要更改
var $wm_text_pos = 3; //水印文字放置位置
var $wm_text_font = ""; //水印文字的字体
var $wm_text_color = "#cccccc"; //水印字体的颜色值
function create($filename="")
{
if ($filename) $this->src_image_name = strtolower(trim($filename));
$src_image_type = $this->get_type($this->src_image_name);
$src_image = $this->createImage($src_image_type,$this->src_image_name);
if (!$src_image) return;
$src_image_w=ImageSX($src_image);
$src_image_h=ImageSY($src_image);
if ($this->wm_image_name){
$this->wm_image_name = strtolower(trim($this->wm_image_name));
$wm_image_type = $this->get_type($this->wm_image_name);
$wm_image = $this->createImage($wm_image_type,$this->wm_image_name);
$wm_image_w=ImageSX($wm_image);
$wm_image_h=ImageSY($wm_image);
$temp_wm_image = $this->getPos($src_image_w,$src_image_h,$this->wm_image_pos,$wm_image);
$wm_image_x = $temp_wm_image["dest_x"];
$wm_image_y = $temp_wm_image["dest_y"];
imageCopyMerge($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h,$this->wm_image_transition);
}
if ($this->wm_text){
$this->wm_text = $this->gb2utf8($this->wm_text);
$temp_wm_text = $this->getPos($src_image_w,$src_image_h,$this->wm_text_pos);
$wm_text_x = $temp_wm_text["dest_x"];
$wm_text_y = $temp_wm_text["dest_y"];
if(preg_match("/([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])/i", $this->wm_text_color, $color))
{
$red = hexdec($color[1]);
$green = hexdec($color[2]);
$blue = hexdec($color[3]);
$wm_text_color = imagecolorallocate($src_image, $red,$green,$blue);
}else{
$wm_text_color = imagecolorallocate($src_image, 255,255,255);
}
imagettftext($src_image, $this->wm_text_size, $this->wm_angle, $wm_text_x, $wm_text_y, $wm_text_color,$this->wm_text_font, $this->wm_text);
}
if ($this->save_file) {
switch ($this->output_type){
case 'gif':$src_img=ImagePNG($src_image, $this->save_file); break;
case 'jpeg':$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
case 'png':$src_img=ImagePNG($src_image, $this->save_file); break;
default:$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
}
} else {
if ($src_image_type = "jpg") $src_image_type="jpeg";
header("Content-type: image/{$src_image_type}");
switch ($src_image_type){
case 'gif':$src_img=ImagePNG($src_image); break;
case 'jpg':$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
case 'png':$src_img=ImagePNG($src_image);break;
default:$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
}
}
imagedestroy($src_image);
}
/**
* 根据文件名和类型创建图片
*
* @access private
* @param string $type 图片的类型,包括gif,jpg,png
* @param string $img_name 图片文件名,包括路径名,如"./mouse.jpg"
* @return mixed $tmp_img 返回一图像标识符
*/
function createImage($type,$img_name){
if (!$type){
$type = $this->get_type($img_name);
}
switch ($type){
case 'gif':
if (function_exists('imagecreatefromgif'))
$tmp_img=@ImageCreateFromGIF($img_name);
break;
case 'jpg':
$tmp_img=ImageCreateFromJPEG($img_name);
break;
case 'png':
$tmp_img=ImageCreateFromPNG($img_name);
break;
default:
$tmp_img=ImageCreateFromString($img_name);
break;
}
return $tmp_img;
}
/**
* 根据源图像的长、宽,位置代码,水印图片id来生成把水印放置到源图像中的位置
*
* @access pravate
* @param int $sourcefile_width 源图像的宽
* @param int $sourcefile_height 原图像的高
* @param int $pos 位置代码
* 0 = middle
* 1 = top left
* 2 = top right
* 3 = bottom right
* 4 = bottom left
* 5 = top middle
* 6 = middle right
* 7 = bottom middle
* 8 = middle left
* @param int $wm_image 水印图片ID
* @return array 返回位置参数数组
*/
function getPos($sourcefile_width,$sourcefile_height,$pos,$wm_image=""){
if ($wm_image){
$insertfile_width = ImageSx($wm_image);
$insertfile_height = ImageSy($wm_image);
}else {
$lineCount = explode("/r/n",$this->wm_text);
$fontSize = imagettfbbox($this->wm_text_size,$this->wm_text_angle,$this->wm_text_font,$this->wm_text);
$insertfile_width = $fontSize[2] - $fontSize[0];
$insertfile_height = count($lineCount)*($fontSize[1] - $fontSize[3]);
}
switch ($pos){
case 0:
$dest_x = ( $sourcefile_width / 2 ) - ( $insertfile_width / 2 );
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
case 1:
$dest_x = 0;
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 2:
$dest_x = $sourcefile_width - $insertfile_width;
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 3:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 4:
$dest_x = 0;
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 5:
$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 6:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
case 7:
$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 8:
$dest_x = 0;
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
default:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = $sourcefile_height - $insertfile_height;
break;
}
return array("dest_x"=>$dest_x,"dest_y"=>$dest_y);
}
/**
* 指定的文字转换为UTF-8格式,包括中英文混合
*
* @access private
* @param string $gb 输入gb类型的字数串
* @return string $utf8
*/
function gb2utf8($gb)
{
if(!trim($gb))
return $gb;
$filename="./gb2312.txt";
$tmp=file($filename);
$codetable=array();
while(list($key,$value)=each($tmp))
$codetable[hexdec(substr($value,0,6))]=substr($value,7,6);
$utf8="";
while($gb)
{
if (ord(substr($gb,0,1))>127) {
$tthis=substr($gb,0,2);
$gb=substr($gb,2,strlen($gb)-2);
$utf8.=$this->u2utf8(hexdec($codetable[hexdec(bin2hex($tthis))-0x8080]));
} else {
$tthis=substr($gb,0,1);
$gb=substr($gb,1,strlen($gb)-1);
$utf8.=$this->u2utf8($tthis);
}
}
return $utf8;
}
function u2utf8($c)
{
$str="";
if ($c < 0x80) {
$str.=$c;
} else if ($c < 0x800) {
$str.=chr(0xC0 | $c>>6);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c < 0x10000) {
$str.=chr(0xE0 | $c>>12);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c < 0x200000) {
$str.=chr(0xF0 | $c>>18);
$str.=chr(0x80 | $c>>12 & 0x3F);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
}
return $str;
}
/**
* 获得图片的格式,包括jpg,png,gif
*
* @access private
* @param string $img_name 图片文件名,可以包括路径名
* @return string $type
*/
function get_type($img_name)
{
$name_array = explode(".",$img_name);
if (preg_match("//.(jpg|jpeg|gif|png)$/", $img_name, $matches))
$type = strtolower($matches[1]);
else
$type = "string";
return $type;
}
}
?>
Class Gimage{
var $src_image_name = ""; //输入图片的文件名(必须包含路径名)
var $jpeg_quality = 90; //jpeg图片质量
var $save_image_file = ''; //输出文件名
var $wm_image_name = ""; //水印图片的文件名(必须包含路径名)
var $wm_image_pos = 1; //水印图片放置的位置
// 0 = middle
// 1 = top left
// 2 = top right
// 3 = bottom right
// 4 = bottom left
// 5 = top middle
// 6 = middle right
// 7 = bottom middle
// 8 = middle left
//other = 3
var $wm_image_transition = 20; //水印图片与原图片的融合度 (1=100)
var $wm_text = ""; //水印文字(支持中英文以及带有/r/n的跨行文字)
var $wm_text_size = 20; //水印文字大小
var $wm_text_angle = 4; //水印文字角度,这个值尽量不要更改
var $wm_text_pos = 3; //水印文字放置位置
var $wm_text_font = ""; //水印文字的字体
var $wm_text_color = "#cccccc"; //水印字体的颜色值
function create($filename="")
{
if ($filename) $this->src_image_name = strtolower(trim($filename));
$src_image_type = $this->get_type($this->src_image_name);
$src_image = $this->createImage($src_image_type,$this->src_image_name);
if (!$src_image) return;
$src_image_w=ImageSX($src_image);
$src_image_h=ImageSY($src_image);
if ($this->wm_image_name){
$this->wm_image_name = strtolower(trim($this->wm_image_name));
$wm_image_type = $this->get_type($this->wm_image_name);
$wm_image = $this->createImage($wm_image_type,$this->wm_image_name);
$wm_image_w=ImageSX($wm_image);
$wm_image_h=ImageSY($wm_image);
$temp_wm_image = $this->getPos($src_image_w,$src_image_h,$this->wm_image_pos,$wm_image);
$wm_image_x = $temp_wm_image["dest_x"];
$wm_image_y = $temp_wm_image["dest_y"];
imageCopyMerge($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h,$this->wm_image_transition);
}
if ($this->wm_text){
$this->wm_text = $this->gb2utf8($this->wm_text);
$temp_wm_text = $this->getPos($src_image_w,$src_image_h,$this->wm_text_pos);
$wm_text_x = $temp_wm_text["dest_x"];
$wm_text_y = $temp_wm_text["dest_y"];
if(preg_match("/([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])/i", $this->wm_text_color, $color))
{
$red = hexdec($color[1]);
$green = hexdec($color[2]);
$blue = hexdec($color[3]);
$wm_text_color = imagecolorallocate($src_image, $red,$green,$blue);
}else{
$wm_text_color = imagecolorallocate($src_image, 255,255,255);
}
imagettftext($src_image, $this->wm_text_size, $this->wm_angle, $wm_text_x, $wm_text_y, $wm_text_color,$this->wm_text_font, $this->wm_text);
}
if ($this->save_file) {
switch ($this->output_type){
case 'gif':$src_img=ImagePNG($src_image, $this->save_file); break;
case 'jpeg':$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
case 'png':$src_img=ImagePNG($src_image, $this->save_file); break;
default:$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
}
} else {
if ($src_image_type = "jpg") $src_image_type="jpeg";
header("Content-type: image/{$src_image_type}");
switch ($src_image_type){
case 'gif':$src_img=ImagePNG($src_image); break;
case 'jpg':$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
case 'png':$src_img=ImagePNG($src_image);break;
default:$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
}
}
imagedestroy($src_image);
}
/**
* 根据文件名和类型创建图片
*
* @access private
* @param string $type 图片的类型,包括gif,jpg,png
* @param string $img_name 图片文件名,包括路径名,如"./mouse.jpg"
* @return mixed $tmp_img 返回一图像标识符
*/
function createImage($type,$img_name){
if (!$type){
$type = $this->get_type($img_name);
}
switch ($type){
case 'gif':
if (function_exists('imagecreatefromgif'))
$tmp_img=@ImageCreateFromGIF($img_name);
break;
case 'jpg':
$tmp_img=ImageCreateFromJPEG($img_name);
break;
case 'png':
$tmp_img=ImageCreateFromPNG($img_name);
break;
default:
$tmp_img=ImageCreateFromString($img_name);
break;
}
return $tmp_img;
}
/**
* 根据源图像的长、宽,位置代码,水印图片id来生成把水印放置到源图像中的位置
*
* @access pravate
* @param int $sourcefile_width 源图像的宽
* @param int $sourcefile_height 原图像的高
* @param int $pos 位置代码
* 0 = middle
* 1 = top left
* 2 = top right
* 3 = bottom right
* 4 = bottom left
* 5 = top middle
* 6 = middle right
* 7 = bottom middle
* 8 = middle left
* @param int $wm_image 水印图片ID
* @return array 返回位置参数数组
*/
function getPos($sourcefile_width,$sourcefile_height,$pos,$wm_image=""){
if ($wm_image){
$insertfile_width = ImageSx($wm_image);
$insertfile_height = ImageSy($wm_image);
}else {
$lineCount = explode("/r/n",$this->wm_text);
$fontSize = imagettfbbox($this->wm_text_size,$this->wm_text_angle,$this->wm_text_font,$this->wm_text);
$insertfile_width = $fontSize[2] - $fontSize[0];
$insertfile_height = count($lineCount)*($fontSize[1] - $fontSize[3]);
}
switch ($pos){
case 0:
$dest_x = ( $sourcefile_width / 2 ) - ( $insertfile_width / 2 );
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
case 1:
$dest_x = 0;
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 2:
$dest_x = $sourcefile_width - $insertfile_width;
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 3:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 4:
$dest_x = 0;
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 5:
$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 6:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
case 7:
$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 8:
$dest_x = 0;
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
default:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = $sourcefile_height - $insertfile_height;
break;
}
return array("dest_x"=>$dest_x,"dest_y"=>$dest_y);
}
/**
* 指定的文字转换为UTF-8格式,包括中英文混合
*
* @access private
* @param string $gb 输入gb类型的字数串
* @return string $utf8
*/
function gb2utf8($gb)
{
if(!trim($gb))
return $gb;
$filename="./gb2312.txt";
$tmp=file($filename);
$codetable=array();
while(list($key,$value)=each($tmp))
$codetable[hexdec(substr($value,0,6))]=substr($value,7,6);
$utf8="";
while($gb)
{
if (ord(substr($gb,0,1))>127) {
$tthis=substr($gb,0,2);
$gb=substr($gb,2,strlen($gb)-2);
$utf8.=$this->u2utf8(hexdec($codetable[hexdec(bin2hex($tthis))-0x8080]));
} else {
$tthis=substr($gb,0,1);
$gb=substr($gb,1,strlen($gb)-1);
$utf8.=$this->u2utf8($tthis);
}
}
return $utf8;
}
function u2utf8($c)
{
$str="";
if ($c < 0x80) {
$str.=$c;
} else if ($c < 0x800) {
$str.=chr(0xC0 | $c>>6);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c < 0x10000) {
$str.=chr(0xE0 | $c>>12);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
} else if ($c < 0x200000) {
$str.=chr(0xF0 | $c>>18);
$str.=chr(0x80 | $c>>12 & 0x3F);
$str.=chr(0x80 | $c>>6 & 0x3F);
$str.=chr(0x80 | $c & 0x3F);
}
return $str;
}
/**
* 获得图片的格式,包括jpg,png,gif
*
* @access private
* @param string $img_name 图片文件名,可以包括路径名
* @return string $type
*/
function get_type($img_name)
{
$name_array = explode(".",$img_name);
if (preg_match("//.(jpg|jpeg|gif|png)$/", $img_name, $matches))
$type = strtolower($matches[1]);
else
$type = "string";
return $type;
}
}
?>
该类使用方法如下:
$img = new Gimage();
$img->wm_text = "www.discuz.com";
$img->wm_text_font = "./STXINWEI.TTF";
$img->create("./mouse.jpg");
$img->wm_text = "www.discuz.com";
$img->wm_text_font = "./STXINWEI.TTF";
$img->create("./mouse.jpg");
mouse.jpg 是你要在其上添加水印的图片名称,注意包含路径名
STXINWEI.TTF 是字体文件的路径名+文件名
这就是一个简单的测试。如果要调整更复杂的显示效果,只要修改一下类中的属性就可以了,例如把字体放大就可以
$img->wm_text_size = 20;
增加水印图片就可以
$img->wm_image_name=”文件名”;
二、给图片增加水印的php文件,包含实际运行代码,支持图片和文字水印
<?php
/*
* 功能:PHP图片水印 (水印支持图片或文字)
* 参数:
* $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);
*
* 注意:Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG
* $waterImage 和 $waterText 最好不要同时使用,选其中之一即可,优先使用 $waterImage。
* 当$waterImage有效时,参数$waterString、$stringFont、$stringColor均不生效。
* 加水印后的图片的文件名和 $groundImage 一样。
* 作者:longware @ 2004-11-3 14:15:13
*/
function imageWaterMark($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);
}
if(isset($_FILES) && !empty($_FILES['userfile']) && $_FILES['userfile']['size']>0) {
$uploadfile = "./".time()."_".$_FILES['userfile']['name'];
if (copy($_FILES['userfile']['tmp_name'], $uploadfile)) {
echo "OK<br>";
//文字水印
imageWaterMark($uploadfile,0,"","HTTP://BLOG.CSDN.NET/LONGWARE/",5,"#FF0000");
//图片水印
//$waterImage="./Hanweb_shuiyin.gif";//水印图片路径
//imageWaterMark($uploadfile,0,$waterImage);
echo "<img src=/"".$uploadfile."/" border=/"0/">";
} else {
echo "Fail<br>";
}
}
?>
<form enctype="multipart/form-data" method="POST">
文件: <input name="userfile" type="file">
<input type="submit" value="上传">
</form>
/*
* 功能:PHP图片水印 (水印支持图片或文字)
* 参数:
* $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);
*
* 注意:Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG
* $waterImage 和 $waterText 最好不要同时使用,选其中之一即可,优先使用 $waterImage。
* 当$waterImage有效时,参数$waterString、$stringFont、$stringColor均不生效。
* 加水印后的图片的文件名和 $groundImage 一样。
* 作者:longware @ 2004-11-3 14:15:13
*/
function imageWaterMark($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);
}
if(isset($_FILES) && !empty($_FILES['userfile']) && $_FILES['userfile']['size']>0) {
$uploadfile = "./".time()."_".$_FILES['userfile']['name'];
if (copy($_FILES['userfile']['tmp_name'], $uploadfile)) {
echo "OK<br>";
//文字水印
imageWaterMark($uploadfile,0,"","HTTP://BLOG.CSDN.NET/LONGWARE/",5,"#FF0000");
//图片水印
//$waterImage="./Hanweb_shuiyin.gif";//水印图片路径
//imageWaterMark($uploadfile,0,$waterImage);
echo "<img src=/"".$uploadfile."/" border=/"0/">";
} else {
echo "Fail<br>";
}
}
?>
<form enctype="multipart/form-data" method="POST">
文件: <input name="userfile" type="file">
<input type="submit" value="上传">
</form>
有什么问题欢迎大家一起探讨,如果有更好的实现思路欢迎分享。
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