[PHP] 超全局变量$_FILES上传文件详解编程语言

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); 

? 

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