PHP实例：php处理单文件、多文件上传代码分享

<?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=2*1024*1024;   //上传文件大小限制, 单位BYTE 
$destination_folder=get_stylesheet_directory().'/mytest/'; //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="test"; //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); 
$imgpreviewsize=1/2;  //缩略图比例 
if ($_SERVER['REQUEST_METHOD'] == 'POST') 
{ 
  $fileArray = $_FILES['upfile'];//获取多个文件的信息,注意：这里的键名不包含[]
  print_r($fileArray);
  echo "<br/>";
  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; 
  //$destination = $destination_folder.$file["name"]; 
  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($imgpreview==1) 
  { 
  echo "<br>图片预览:<br>"; 
  echo "<img src=\"/wp-content/themes/HotNewspro/mytest/".$fname."\" 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:\">"; 
  } 
  
} 
?> 

   <form enctype="multipart/form-data" method="post" name="upform"
    action="submit_form_process.php"> 
    <input name="testparas" value="test" type="text">
     <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>  

  <form enctype="multipart/form-data" method="post" name="upform" tatget="iframefile"
    action="submit_form_process.php"> 
    <input name="testparas" value="test" type="text">
     <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>
　　　　<iframe name="iframefile" >