$_FILES详解

<form enctype="multipart/form-data" action="upload.php" method="post">

<input type="hidden" name="MAX_FILE_SIZE" value="1000">

<input name="myFile" type="file">

<input type="submit" value="上传文件">

</form>

然后upload.php中可以直接用
$_FILES
$_POST
$_GET
等函数获取表单内容。

下面针对$_FILES讲解
当客户端提交后，我们获得了一个$_FILES 数组

$_FILES数组内容如下:
$_FILES['myFile']['name'] 　　   客户端文件的原名称。
$_FILES['myFile']['type'] 　　    文件的MIME 类型，需要浏览器提供该信息的支持，例如"image/gif"。
$_FILES['myFile']['size'] 　　     已上传文件的大小，单位为字节。
$_FILES['myFile']['tmp_name'] 文件被上传后在服务端储存的临时文件名，一般是系统默认。可以在php.ini的upload_tmp_dir 指定，但用 putenv() 函数设置是不起作用
$_FILES['myFile']['error']　　    和该文件上传相关的错误代码。['error'] 是在 PHP 4.2.0 版本中增加的。下面是它的说明：(它们在PHP3.0以后成了常量)

错误码说明:
0 UPLOAD_ERR_OK    　　　　上传成功
1 UPLOAD_ERR_INI_SIZE    　　超过php.ini中upload_max_filesize限制
2 UPLOAD_ERR_FORM_SIZE 　超过表单中max_file_size限制
3 UPLOAD_ERR_PARTIAL     　　只有部分文件被上传
4 UPLOAD_ERR_NO_FILE     　　没有文件被上传
5                 　　　　　　　　　　上传文件大小是0
6 UPLOAD_ERR_NO_TMP_DIR 　　找不到临时文件夹
7 UPLOAD_ERR_CANT_WRITE 　文件写入失败

下面是官方错误码提示代码

<?php

class UploadException extends Exception

{

    public function __construct($code) {

        $message = $this->codeToMessage($code);

        parent::__construct($message, $code);

    }

    private function codeToMessage($code)

    {

        switch ($code) {

            case UPLOAD_ERR_INI_SIZE:

                $message = "The uploaded file exceeds the upload_max_filesize directive in php.ini";

                break;

            case UPLOAD_ERR_FORM_SIZE:

                $message = "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form";

                break;

            case UPLOAD_ERR_PARTIAL:

                $message = "The uploaded file was only partially uploaded";

                break;

            case UPLOAD_ERR_NO_FILE:

                $message = "No file was uploaded";

                break;

            case UPLOAD_ERR_NO_TMP_DIR:

                $message = "Missing a temporary folder";

                break;

            case UPLOAD_ERR_CANT_WRITE:

                $message = "Failed to write file to disk";

                break;

            case UPLOAD_ERR_EXTENSION:

                $message = "File upload stopped by extension";

                break;

            default:

                $message = "Unknown upload error";

                break;

        }

        return $message;

    }

}

// Use

if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {

//uploading successfully done

} else {

throw new UploadException($_FILES['file']['error']);

}

?>

巴特西

$_FILES详解

最新文章

热门文章