PHP文件上传简单实例

<?php
header("content-type:text/html;charset=utf-8");
$path = getcwd()."/upload/";

if($_POST['submit'])
{
 $fname = $_FILES['ufile']['name'];
 $tmp_name = $_FILES['ufile']['tmp_name'];

//允许上传的文件后缀名：
 $pathinfo = pathinfo($fname);
 $fext = $pathinfo['extension'];
 $allowf = array("gif","GIF","png","PNG","jpeg","JPEG","jpg","JPG");

 if(!in_array($fext,$allowf))
 {
  echo "不允许的文件类型，<a href='test.php'>请重新上传</a>";
  exit;
 }
/*
另一种检验允许通过的文件类型方法：
 $type = $_FILES['ufile']['type'];
 switch($type)
  {
   case "image/pjpeg" : $ok = 1;
   break;
   case "image/jpeg" : $ok = 1;
   break;
   case "image/png" : $ok = 1;
   break;
   case "image/gif" : $ok = 1;
   break;
  }
  if($ok||$error==0)
  {
   move_uploaded_file($tmp_name,$path.$fname);
   echo "<script>alert('文件上传成功！');</script>";
  }
*/
//文件检验通过后上传： 
 if(move_uploaded_file($tmp_name,$path.$fname))
 {
  echo "文件上传成功！";
 }
 
 else
 {
  echo "上传文件失败!";
 }
}

?>

<form action="<?=$_SERVER['PHP_SELF']?>" method="post" enctype="multipart/form-data">
<p>选择要上传的文件：<input type="file" name="ufile"></p>
<p><input type="submit" name="submit" value="上传"></p>
</form>