PHP实现上传文件到服务器

<?php
    /****************************
    ***  功能：上传文件到服务器
    ****************************/
    session_start();
?>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>通过move_upload_file()函数上传文件到服务器</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table width="830" border="0" cellpadding="0" cellspacing="0">
  <tr>
    <td colspan="3"><img src="images/bg_01.jpg" width="830" height="133" /></td>
  </tr>
   <form action="" method="post" enctype="multipart/form-data">
  <tr>
    <td width="193" rowspan="4">&nbsp; <input type="hidden" name="MAX_FILE_SIZE" value="10000000000000" /></td>
    <td width="423" height="50">选择上传文件：
        <!--此语句可以显示一个按钮用来打开本地电脑---->
      <input type="file" name="up_picture"/>
    </td>
    <td width="214" rowspan="4">&nbsp;</td>
  </tr>
  <tr>
    <td height="30" align="center"><span class="STYLE1">上传文件</span></td>
  </tr>
  <tr>
    <td height="50" align="center"><input type="image" name="imageField2" src="images/bg_09.jpg" />
    &nbsp;&nbsp;&nbsp;&nbsp;<input type="image" name="imageField3" src="images/bg_11.jpg" /></td>
  </tr>
    </form>
  <tr>
    <td height="70">
<?php
    if(!empty($_FILES["up_picture"]["name"])){//判断上传内容是否为空
        if($_FILES["up_picture"]["error"] > 0){//判断文件是否可以上传到服务器
            echo "上传错误！";
            switch($_FILES["up_picture"]["error"]){//如果上传错误 判断出错原因
                case 1:
                    echo "上传文件大小超出配置文件规定值";
                break;
                case 2:
                    echo "上传文件大小超出表单中约定值";
                break;
                case 3:
                    echo "上传文件不全";
                break;
                case 4:
                    echo "没有上传文件";
                break;
            }
        }else{
            if(!is_dir("./upfile/")){//判断指定目录是否存在
                mkdir("./upfile/");//创建一个目录
            }
            
            $path = './upfile/'.time().strstr($_FILES["up_picture"]["name"],'.');//定义文件名称和存储位置
            
            if(is_uploaded_file($_FILES['up_picture']['tmp_name'])){//是否是HTTP POST上传
                if(move_uploaded_file($_FILES['up_picture']['tmp_name'],$path)){//执行上传
                    echo "上传文件".$_FILES['up_picture']['name']."成功.文件大小为：".$_FILES['up_picture']['size'];                    
                }else{
                    echo "上传失败";
                }
            }else{
                echo "上传文件".$_FILES['up_picture']['name']."不合法";
            }
        }
    }
?>
</td>
  </tr>
  <tr>
    <td colspan="3"><img src="images/bg_14.jpg" width="830" height="30" /></td>
  </tr>
</table>
</body>
</html>
PHP实现上传文件到服务器

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