<?php
require 'config.inc.php';
if (isset($_POST['send'])) {
$img = $_FILES['img'];
if (is_uploaded_file($img['tmp_name']) && is_array($img)) {
$name = $img["name"];
$type = $img["type"];
$size = $img["size"];
if ( $size > ceil("530000") ) {
echo "<script>alert('图片大小超过500kb,无法上传')</script>";
break;
}
$cur_time = date("Y-m-d H:i:s");
$tmp_name = $img["tmp_name"];
//求出上传图片的名称后缀
$ext_name = strtolower(substr($name, strrpos($name, '.'), strlen($name)));
$new_name='jzy_' . time() . rand(1000,9999) . $ext_name ;
$store_path = ROOT_PATH . UPDIR . $new_name;
//求上传图片高宽
$imginfo = getimagesize($tmp_name);
$width = $imginfo[0];
$height = $imginfo[1];
//添加图片水印
switch($ext_name) {
case '.gif':
$dst_im = imagecreatefromgif($tmp_name);
break;
case '.jpg':
$dst_im = imagecreatefromjpeg($tmp_name);
break;
case '.png':
$dst_im = imagecreatefrompng($tmp_name);
break;
default:
echo "<script>alert('上传图片格式不正确,请上传gif jpeg或png格式的图片!')</script>";
break;
}
$src_im = imagecreatefrompng(IMG_PATH . 'logo.png');
//求水印图片高宽
$src_imginfo = getimagesize(IMG_PATH . 'logo.png');
$src_width = $src_imginfo[0];
$src_height = $src_imginfo[1];
//求出水印图片的实际生成位置
$src_x = $width - $src_width - 10;
$src_y = $height - $src_height - 10;
//新建一个真彩色图像
$nimage = imagecreatetruecolor($width, $height);
//拷贝上传图片到真彩图像
imagecopy($nimage, $dst_im, 0, 0, 0, 0, $width, $height);
//按坐标位置拷贝水印图片到真彩图像上
imagecopy($nimage, $src_im, $src_x, $src_y, 0, 0, $src_width, $src_height);
//分情况输出生成后的水印图片
switch($ext_name) {
case '.gif':
imagegif($nimage, $tmp_name);
break;
case '.jpg':
imagejpeg($nimage, $tmp_name);
break;
case '.png':
imagepng($nimage, $tmp_name);
break;
}
//释放资源
imagedestroy($dst_im);
imagedestroy($src_im);
unset($imginfo);
unset($src_imginfo);
//移动生成后的图片
@move_uploaded_file($tmp_name, ROOT_PATH.UPDIR . $new_name);
}
}
?>
<form action="" name="frm" method="post" enctype="multipart/form-data">
<input type="file" name="img" /> <input type="submit" value="上传" name="send" />
</form>
