1.$_FILES --超全局变量,HTTP 文件上传变量

通过 HTTP POST 方式上传到当前脚本的项目的数组,PHP 能够接受任何来自符合 RFC-1867 标准的浏览器上传的文件,

上传的过程中,文件存放在/tmp/phpXxXxx里,有的时候磁盘满了,/tmp/下放不了文件也会报错

2.RFC 1867标准

RFC 1867 - Form-based File Upload in HTML

<FORM ENCTYPE="multipart/form-data" ACTION="_URL_" METHOD=POST>

File to process: <INPUT NAME="userfile1" TYPE="file">

<INPUT TYPE="submit" VALUE="Send File">

</FORM>

2.move_uploaded_file ( string $filename , string $destination )

将上传的文件移动到新位置,企邮默认从/tmp/phpxxxx到/mnt/entmail/webapp/uploads

3.上传多个文件

<input name="userfile[]" type="file" /><br />

<input name="userfile[]" type="file" /><br />

获取$_FILES['userfile']['tmp_name'][0],$_FILES['userfile']['tmp_name'][1]

5.对 PUT 方法的支持,使用标准的输入流,$putdata = fopen("php://stdin", "r");

<?php
/* PUT data comes in on the stdin stream */
$putdata = fopen("php://stdin", "r");

/* Open a file for writing */
$fp = fopen("myputfile.ext", "w");

/* Read the data 1 KB at a time
   and write to the file */
while ($data = fread($putdata, 1024))
  fwrite($fp, $data);

/* Close the streams */
fclose($fp);
fclose($putdata);
?>