做了一个图片上传处理类，功能有图片的拉伸,缩小以及加入水印。时间有点仓促,整理花费了好多时间，各位大侠如果觉得还可以点个赞呗。不多说，直接上代码，注释不清晰的大侠们可以直接查PHP的文档。
原图
缩小图
放大图
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<html>
<head>
<title>ZwelL图片上传程序</title>
<style type="text/css">
<!--
body {
font-size: 9pt;
}
input {
background-color: #66CCFF;
border: 1px inset #CCCCCC;
}
-->
</style>
</head>
<body>
<form enctype="multipart/form-data" method="post" name="upform">
上传文件:
<input name="upfile" type="file">
<input type="submit" value="上传"><br>
</form>
</body>
</html>
PHP代码如下
<?php
class FileUploadUtil
{
public $max_file_size = 2000000; //上传文件大小限制, 单位BYTE
public $destination_folder = "upload/"; //上传文件路径
//水印
public $is_water = 1; //是否附加水印(1为加水印,其他为不加水印);
public $water_type = 1; //水印类型(1为文字,2为图片)
public $water_string = "liaoyizhe"; //水印字符串
//缩放
public $is_resize = true; //是否缩放
public $resize_width = 1000; //缩放宽度
public $resize_height = 1000; //缩放高度
//上传文件类型列表
public $file_types = array(
'image/jpg',
'image/jpeg',
'image/png',
'image/pjpeg',
'image/gif',
'image/bmp',
'image/x-png'
);
public function fileUpload()
{
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
return "ACTION必须为POST";
}
if (!is_uploaded_file($_FILES["upfile"]["tmp_name"])) {
return "图片不存在!";
}
//[name] => 123.jpeg [type] => image/jpeg
//[tmp_name] => /Applications/XAMPP/xamppfiles/temp/phpdsYVOn [error] => 0 [size] => 2890
$file = $_FILES["upfile"];
if ($this->max_file_size < $file["size"]) {
return "文件太大!";
}
if (!in_array($file["type"], $this->file_types)) {
return "文件类型不符!" . $file["type"];
}
if (!file_exists($this->destination_folder)) {
mkdir($this->destination_folder);
}
$filename = $file["tmp_name"];
//获得文件类型
$p_info = pathinfo($file["name"]);
$f_type = $p_info['extension'];
$destination = $this->destination_folder . time() . "." . $f_type;
if (file_exists($destination)) {
return "同名文件已经存在了";
}
if (!move_uploaded_file($filename, $destination)) {
return "移动文件出错";
}
//获得图片信息
//Array ( [0] => 200 [1] => 200 [2] => 2 [3] => width="200" height="200" [bits] => 8 [channels] => 3 [mime] => image/jpeg )
$image_info = getimagesize($destination);
if ($this->is_water) {
$this->waterMark($destination, $image_info);
}
switch ($image_info[2]) {
case 2:
$simage = imagecreatefromjpeg($destination);//创建新图像
$this->resizeImage($simage, $this->resize_width, $this->resize_height, $destination, "jpeg");
break;
case 3:
$simage = imagecreatefrompng($destination);
$this->resizeImage($simage, $this->resize_width, $this->resize_height, $destination, "png");
break;
case 6:
$simage = imagecreatefromwbmp($destination);
$this->resizeImage($simage, $this->resize_width, $this->resize_height, $destination, "wbmp");
break;
}
// $p_info = pathinfo($destination);
// $f_name = $p_info["basename"];
// $image_size = getimagesize($filename);
// echo " 文件名:" . $this->destination_folder . $f_name . "</font><br>";
// echo " 宽度:" . $image_size[0];
// echo " 长度:" . $image_size[1];
// echo "<br> 大小:" . $file["size"] . " bytes";
return $destination;
}
private function waterMark($destination, $image_size)
{
$iinfo = getimagesize($destination, $iinfo);
$nimage = imagecreatetruecolor($image_size[0], $image_size[1]);
$white = imagecolorallocate($nimage, 255, 255, 255);
$black = imagecolorallocate($nimage, 0, 0, 0);
imagefill($nimage, 0, 0, $white);
switch ($iinfo[2]) {
case 1:
$simage = imagecreatefromgif($destination);
break;
case 2:
$simage = imagecreatefromjpeg($destination);
break;
case 3:
$simage = imagecreatefrompng($destination);
break;
case 6:
$simage = imagecreatefromwbmp($destination);
break;
default:
die("不支持的文件类型");
}
imagecopy($nimage, $simage, 0, 0, 0, 0, $image_size[0], $image_size[1]);
imagefilledrectangle($nimage, 1, $image_size[1] - 15, 80, $image_size[1], $white);
switch ($this->water_type) {
case 1: //加水印字符串
imagestring($nimage, 2, 3, $image_size[1] - 15, $this->water_string, $black);
break;
case 2: //加水印图片
$simage1 = imagecreatefromgif("xplore.gif");
imagecopy($nimage, $simage1, 0, 0, 0, 0, 85, 15);
imagedestroy($simage1);
break;
}
switch ($iinfo[2]) {
case 1:
imagejpeg($nimage, $destination);
break;
case 2:
imagejpeg($nimage, $destination);
break;
case 3:
imagepng($nimage, $destination);
break;
case 6:
imagewbmp($nimage, $destination);
//imagejpeg($nimage, $destination);
break;
}
//覆盖原上传文件
imagedestroy($nimage);
imagedestroy($simage);
}
private function resizeImage($im, $max_width, $max_height, $name, $file_type)
{
$pic_width = imagesx($im);//源图像宽度
$pic_height = imagesy($im);//源图像高度
$width_tag = false;
$height_tag = false;
$width_ratio = 0;
$height_ratio = 0;
$ratio = 0;
if (($max_width && $pic_width > $max_width) || ($max_height && $pic_height > $max_height)) {
if ($max_width && $pic_width > $max_width) {
$width_ratio = $max_width / $pic_width;
$width_tag = true;
}
if ($max_height && $pic_height > $max_height) {
$height_ratio = $max_height / $pic_height;
$height_tag = true;
}
if ($width_tag && $height_tag) {
if ($width_ratio < $height_ratio)
$ratio = $width_ratio;
else
$ratio = $height_ratio;
}
if ($width_tag && !$height_tag) {
$ratio = $width_ratio;
}
if ($height_tag && !$width_tag) {
$ratio = $height_ratio;
}
$new_width = $pic_width * $ratio;
$new_height = $pic_height * $ratio;
if (function_exists("imagecopyresampled")) {
$new_im = imagecreatetruecolor($new_width, $new_height);//创建一个空图片资源
imagecopyresampled($new_im, $im, 0, 0, 0, 0, $new_width, $new_height, $pic_width, $pic_height);//等比缩放
} else {
$new_im = imagecreate($new_width, $new_height);//创建一个空图片资源
imagecopyresized($new_im, $im, 0, 0, 0, 0, $new_width, $new_height, $pic_width, $pic_height);
}
switch ($file_type) {
case "jpeg":
imagejpeg($new_im, $name);
break;
case "png":
imagepng($new_im, $name);
break;
case "wbmp":
imagewbmp($new_im, $name);
break;
}
imagedestroy($new_im);
} else {
if (function_exists("imagecopyresampled")) {
$new_im = imagecreatetruecolor($max_width, $max_height);//创建一个空图片资源
imagecopyresampled($new_im, $im, 0, 0, 0, 0, $max_width, $max_height, $pic_width, $pic_height);//等比缩放
echo 1111;
} else {
$new_im = imagecreate($max_width, $max_width);//创建一个空图片资源
imagecopyresized($new_im, $im, 0, 0, 0, 0, $max_width, $max_height, $pic_width, $pic_height);
}
switch ($file_type) {
case "jpeg":
imagejpeg($new_im, $name);
break;
case "png":
imagepng($new_im, $name);
break;
case "wbmp":
imagewbmp($new_im, $name);
break;
}
imagedestroy($new_im);
}
}
}
$f = new FileUploadUtil();
$destination = $f->fileUpload();
$image_size = getimagesize($destination);
echo " 文件名:" . $destination . "</font><br>";
echo " 宽度:" . $image_size[0];
echo " 长度:" . $image_size[1];
?>
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