文件上传（加水印、生成预览图）

来源：互联网发布：java多线程 pdf 编辑：程序博客网时间：2024/05/16 15:17
<pre code_snippet_id="397262" snippet_file_name="blog_20140618_1_9018773"  name="code" class="php"><html>  <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  <title>图片上传程序</title>  <?php  //上传文件类型列表  $uptypes=array(      'image/jpg',      'image/jpeg',      'image/png',      'image/gif',      'image/bmp',       'image/pjpeg',);$max_file_size=2000000;     //上传文件大小限制, 单位BYTE$destination_folder="uploadimg/"; //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);  $watertype=2;      //水印类型(1为文字,2为图片)$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.35880.cn/";  //水印字符串  $waterimg="1501469076.jpg";    //水印图片$imgpreview=1;      //是否生成预览图(1为生成,其他为不生成);  $imgpreviewsize=1/1;    //缩略图比例  ?>  <style type="text/css">  body{ font-size: 14px; }  input{ background-color: white; border: 1px inset #CCCCCC;  }  </style></head>   <body>  <form enctype="multipart/form-data" method="post" name="upform">    上传文件:    <input name="upfile" type="file">    <input type="submit" value="上传"><br>    允许上传的文件类型为:<?php echo implode(', ',$uptypes) ?>  </form>   <?php  if ($_SERVER['REQUEST_METHOD'] == 'POST')  {      $file = $_FILES["upfile"];   $filename=$file["tmp_name"];      if (!is_uploaded_file($filename))      //是否存在文件      {           echo "图片不存在!";           exit;      }        if($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);      }        $image_size = getimagesize($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:".$file["size"]." bytes";    // 附加水印    if($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]-15,120,$image_size[1],$white);          // 水印类型        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              $simage1 =imagecreatefromgif("1501469076.jpg");            imagecopy($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($simage);      }      // 是否生成预览图    if($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> </pre>
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