php图片上传加水印,自动增加水印-php教程

这是一款完美的php文件上传代码,图片上传成功后并自动给图片增加上水印,这样很好的快速的提高的了要手工一张张增加水印效果,代码如下:

function upload($uploadfile,$watermark=1,$watertype=1,$content){
foreach($uploadfile['name'] as $key=>$name) { //多文件上传函数
uploadall($uploadfile,$key,$watermark,$watertype,$content);
}
}
function uploadall($uploadfile,$i,$watermark,$watertype,$content) {
$watermark=$watermark; //是否附加水印(1为加水印,其他为不加水印);
$watertype=$watertype; //水印类型(1为文字,2为图片)
$watercontent=$content; //水印的内容
if(emptyempty($uploadfile['name'][$i])) {
die("未选择文件上传");
}
if($uploadfile['error'][$i] == 2) { //验证html判断结果
die("上传的文件太大了");
}
$allow_filemaxsize = 2048000; // 2m
$filesize = $uploadfile['size'][$i];
if($filesize > $allow_filemaxsize) {
die("上传的文件太大了");
}
$allow_filetypes = array("jpeg", "gif", "png","jpg","pjpeg");//允许上传的文件统一资源类型 mimetype
$allow = false; //默认都不允许
$mimetype = $uploadfile['type'][$i]; //上传文件的mime文件类型
foreach($allow_filetypes as $t) {
if(strpos($mimetype, $t) !== false) {
$allow = true; //找到了符合上传条件的文件类型
break;
}
}
if($allow == false) {
die("上传的文件类型不被允许");
}
$result = is_uploaded_file($uploadfile['tmp_name'][$i]); //判断是否为上传动作产生的
if(!$result) {
die("上传的文件有误");
}
$uploaddir = "img/"; //上传文件保存目录
if(!file_exists($uploaddir)) mkdir($uploaddir, 0777, true);//若上传保存目录不存在，则递归创建
/**重命名文件**/
$filetype = explode(".", $uploadfile['name'][$i]);
$filetype = array_pop($filetype);
$uploadfilename = time().".".$filetype;
$_session['filename'] = $uploadfilename;
//end
$result = move_uploaded_file($uploadfile['tmp_name'][$i], $uploaddir.$uploadfilename);
if($result) {
echo "文件上传成功";
}else{
switch($uploadfile['error'][$i]) {
case 1:return "上传的文件超出了php.ini中设定的最大值";break;
case 2:return "上传的文件超出了html中设定的最大值";break;
case 3:return "文件只有部分被上传";break;
case 4;return "没有文件被上传";break;
default:die("文件上传失败");
}
}
if($watermark==1) {
$iinfo=getimagesize($uploaddir.$uploadfilename); //获取图片的相关信息，得到数组
$nimage=imagecreatetruecolor($iinfo[0],$iinfo[1]);
$white=imagecolorallocate($nimage,255,255,255); //设置背景颜色为白色
$black=imagecolorallocate($nimage,0,0,0); //设置背景颜色为黑色
$red=imagecolorallocate($nimage,255,0,0); //设置背景颜色为红色
imagefill($nimage,0,0,$white); //背景填充为白色
switch ($iinfo[2]) {
case 1:
$simage =imagecreatefromgif($uploaddir.$uploadfilename);
break;
case 2:
$simage =imagecreatefromjpeg($uploaddir.$uploadfilename);
break;
case 3:
$simage =imagecreatefrompng($uploaddir.$uploadfilename);
break;
case 6:
$simage =imagecreatefromwbmp($uploaddir.$uploadfilename);
break;
default:
die("不支持的文件类型");
exit;
}
imagecopy($nimage,$simage,0,0,0,0,$iinfo['0'],$iinfo['1']);
switch($watertype) {
case 1: //加水印字符串
imagestring($nimage,5,$iinfo['0']/2-50,$iinfo['1']-30,$watercontent,$black);
break;
case 2: //加水印图片
$simage1 =imagecreatefromgif($watercontent);
$size = getimagesize($watercontent);
imagecopy($nimage,$simage1,$iinfo['0']/2+50,$iinfo['1']-100,0,0,$size[0],$size[1]);
imagedestroy($simage1);
break;
}
switch ($iinfo[2]) {
case 1:
imagejpeg($nimage, $uploaddir.$uploadfilename); //将图像$nimage以$destination文件名创建一个jpeg的格式文件
break;
case 2:
imagejpeg($nimage, $uploaddir.$uploadfilename);
break;
case 3:
imagepng($nimage, $uploaddir.$uploadfilename);
break;
case 6:
imagewbmp($nimage, $uploaddir.$uploadfilename);
break;
}
imagedestroy($nimage); //覆盖原上传文件
imagedestroy($simage);
} //开源代码phpfensi.com
}
if(@$_get['act'] == "insert") { //未作参数校验
//该函数的四个参数分别是：上传控件的name值；是否加水印（1为加，其他数字为不佳）；
//水印的类型（1为字符串，2为图片）；水印的内容,字符串时写数据，图片时写图片的地址；
$picture = upload($_files['picture'],1,2,"img/watermark.gif");//上传文件，并返回上传后的文件路径名
}

上传代码如下:

<form method="post" action="" enctype="multipart/form-data">
<table cellpadding="5" cellspacing="0">
<tr>
<td>产品图片：</td>
<td><input type="hidden" name="max_file_size" value="1024000">
<input type="file" name="picture[]">
</td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="提交"></td>
</tr>
</table>
</form>

php图片上传加水印,自动增加水印

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