PHP文件上传类实例详解

(编辑:jimmy 日期: 2024/11/6 浏览:2)

本文实例讲述了PHP文件上传类。分享给大家供大家参考,具体如下:

这里演示了FileUpload.class.php文件上传类,其中用到了两个常量,可在网站配置文件中定义:

define('ROOT_PATH',dirname(__FILE__)); //网站根目录
define('UPDIR','/uploads/'); //上传主目录

具体代码如下:

<"SCRIPT_NAME"];
       $_dir = dirname(dirname($_path));
       if ($_dir == '\\') $_dir = '/';
       $this->linkpath = $_dir.$this->linkpath;
       return $this->linkpath;
    }
    //移动文件
    private function moveUpload() {
       if (is_uploaded_file($this->tmp)) {
         if (!move_uploaded_file($this->tmp,$this->setNewName())) {
            Tool::alertBack('警告:上传失败!');
         }
       } else {
         Tool::alertBack('警告:临时文件不存在!');
       }
    }
    //设置新文件名
    private function setNewName() {
       $_nameArr = explode('.',$this->name);
       $_postfix = $_nameArr[count($_nameArr)-1];
       $_newname = date('YmdHis').mt_rand(100,1000).'.'.$_postfix;
       $this->linkpath = UPDIR.$this->linktotay.$_newname;
       return $this->today.$_newname;
    }
    //验证目录
    private function checkPath() {
       if (!is_dir($this->path) || !is_writeable($this->path)) {
         if (!mkdir($this->path)) {
            Tool::alertBack('警告:主目录创建失败!');
         }
       }
       if (!is_dir($this->today) || !is_writeable($this->today)) {
         if (!mkdir($this->today)) {
            Tool::alertBack('警告:子目录创建失败!');
         }
       }
    }
    //验证类型
    private function checkType() {
       if (!in_array($this->type,$this->typeArr)) {
         Tool::alertBack('警告:不合法的上传类型!');
       }
    }
    //验证错误
    private function checkError() {
       if (!empty($this->error)) {
         switch ($this->error) {
            case 1 :
              Tool::alertBack('警告:上传值超过了约定最大值!');
              break;
            case 2 :
              Tool::alertBack('警告:上传值超过了'.$this->maxsize.'KB!');
              break;
            case 3 :
              Tool::alertBack('警告:只有部分文件被上传!');
              break;
            case 4 :
              Tool::alertBack('警告:没有任何文件被上传!');
              break;
            default:
              Tool::alertBack('警告:未知错误!');
         }
       }
    }
  }
"htmlcode">
<"<script type='text/javascript'>alert('$_info');history.back();</script>";
       exit();
     }     //弹窗赋值关闭
     static public function alertOpenerClose($_info,$_path) {
       echo "<script type='text/javascript'>alert('$_info');</script>";
       echo "<script type='text/javascript'>opener.document.content.thumbnail.value='$_path';</script>";
       echo "<script type='text/javascript'>opener.document.content.pic.style.display='block';</script>";
       echo "<script type='text/javascript'>opener.document.content.pic.src='$_path';</script>";
       echo "<script type='text/javascript'>window.close();</script>";
       exit();
     } }
"htmlcode">
<!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>main</title>
  </head>
  <body>
     <form name="content" method="post" action="">
     <input type="text" name="thumbnail" class="text" readonly="readonly" /> <input type="button" value="上传" onclick="centerWindow('./upfile.html','upfile','400','100')" /> <img name="pic" style="display:none;" /> ( * 必须是jpg,gif,png,并且200k内) <br />
     </form>
  </body>
</html>

2、创建 upfile.html 文件,建立表单提交到 upload.php

upfile.html

<!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>上传图片</title>
  </head>
  <body></p><p>   <form method="post" action="./upload.php" enctype="multipart/form-data" style="text-align:center;margin:30px;">
    <input type="hidden" name="MAX_FILE_SIZE" value="204800" />
    <input type="file" name="pic" />
    <input type="submit" name="send" value="确定上传" />
</form></p><p></body>
</html>

3、通过 upload.php 文件调用文件上传类实现上传,并且把路径赋给 input 标签和显示图片

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希望本文所述对大家PHP程序设计有所帮助。