PHP图片上传程序（完整版）

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

<!DOCTYPE html>
<?php
/* * **************************************************************************** 

  参数说明:
  $max_file_size  : 上传文件大小限制, 单位BYTE
  $destination_folder : 上传文件路径
  $watermark   : 是否附加水印(1为加水印,其他为不加水印);

  使用说明:
  1. 将PHP.INI文件里面的"extension=php_gd2.dll"一行前面的;号去掉,因为我们要用到GD库;
  2. 将extension_dir =改为你的php_gd2.dll所在目录;
 * **************************************************************************** */

//上传文件类型列表  
$uptypes = array(
    'image/jpg',
    'image/jpeg',
    'image/png',
    'image/pjpeg',
    'image/gif',
    'image/bmp',
    'image/x-png'
);

$max_file_size = 2000000;     //上传文件大小限制, 单位BYTE  
$destination_folder = "images/"; //上传文件路径  
$watermark = 1;      //是否附加水印(1为加水印,其他为不加水印);  
$watertype = 1;      //水印类型(1为文字,2为图片)  
$waterposition = 1;     //水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中);  
$waterstring = "http://www.xplore.cn/";  //水印字符串  
$waterimg = "xplore.gif";    //水印图片  
$imgpreview = 1;      //是否生成预览图(1为生成,其他为不生成);  
$imgpreviewsize = 1 / 2;    //缩略图比例  
?>  
<html>  
    <head>  
        <meta charset="UTF-8">
        <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>  
            允许上传的文件类型为:<?= implode(', ', $uptypes) ?>  
        </form>  

        <?php
        if ($_SERVER['REQUEST_METHOD'] == 'POST') {
            if (!is_uploaded_file($_FILES["upfile"][tmp_name])) {
            //是否存在文件  
                echo "图片不存在!";
                exit;
            }

            $file = $_FILES["upfile"];
            if ($max_file_size < $file["size"]) {
            //检查文件大小  
                echo "文件太大!";
                exit;
            }

            if (!in_array($file["type"], $uptypes)) {
            //检查文件类型  
                echo "文件类型不符!" . $file["type"];
                exit;
            }

            if (!file_exists($destination_folder)) {
                mkdir($destination_folder);
            }

            $filename = $file["tmp_name"];
            $image_size = getimagesize($filename);
            $pinfo = pathinfo($file["name"]);
            $ftype = $pinfo['extension'];
            $destination = $destination_folder . time() . "." . $ftype;
            if (file_exists($destination) && $overwrite != true) {
                echo "同名文件已经存在了";
                exit;
            }

            if (!move_uploaded_file($filename, $destination)) {
                echo "移动文件出错";
                exit;
            }

            $pinfo = pathinfo($destination);
            $fname = $pinfo[basename];
            echo " <font color=red>已经成功上传</font><br>文件名:  <font color=blue>" . $destination_folder . $fname . "</font><br>";
            echo " 宽度:" . $image_size[0];
            echo " 长度:" . $image_size[1];
            echo "<br> 大小:" . $file["size"] . " bytes";

            if ($watermark == 1) {
                $iinfo = getimagesize($destination, $iinfo);
                $nimage = imagecreatetruecolor($image_size[0], $image_size[1]);
                $white = imagecolorallocate($nimage, 255, 255, 255);
                $black = imagecolorallocate($nimage, 0, 0, 0);
                $red = imagecolorallocate($nimage, 255, 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");
                        exit;
                }

                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 ($watertype) {
                    case 1:   //加水印字符串  
                        imagestring($nimage, 2, 3, $image_size[1] - 15, $waterstring, $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 ($iinfo[2]) {
                    case 1:
                        //imagegif($nimage, $destination);  
                        imagejpeg($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);
            }

            if ($imgpreview == 1) {
                echo "<br>图片预览:<br>";
                echo "<img src=\"" . $destination . "\" width=" . ($image_size[0] * $imgpreviewsize) . " height=" . ($image_size[1] * $imgpreviewsize);
                echo " alt=\"图片预览:\r文件名:" . $destination . "\r上传时间:\">";
            }
        }
        ?>  
    </body>  
</html>