Register Register Member Login Member Login Member Login Forgot Password ??
PHP , ASP , ASP.NET, VB.NET, C#, Java , jQuery , Android , iOS , Windows Phone

Registered : 109,022

HOME > PHP Manual > PHP input/output streams



PHP input/output streams

  • php://stdin
  • php://stdout
  • php://stderr
  • php://output
  • php://input
  • php://filter (available since PHP 5.0.0)
  • php://memory (available since PHP 5.1.0)
  • php://temp (available since PHP 5.1.0)

php://stdin, php://stdout and php://stderr allow access to the corresponding input or output stream of the PHP process. The stream references a duplicate file descriptor, so if you open php://stdin and later close it, you close only your copy of the descriptor--the actual stream referenced by STDIN is unaffected. Note that PHP exhibited buggy behavior in this regard until PHP 5.2.1. It is recommended that you simply use the constants STDIN, STDOUT and STDERR instead of manually opening streams using these wrappers.

php://output allows you to write to the output buffer mechanism in the same way as print() and echo().

php://input allows you to read raw POST data. It is a less memory intensive alternative to $HTTP_RAW_POST_DATA and does not need any special php.ini directives. php://input is not available with enctype="multipart/form-data".

php://stdin and php://input are read-only, whereas php://stdout, php://stderr and php://output are write-only.

php://filter is a kind of meta-wrapper designed to permit the application of filters to a stream at the time of opening. This is useful with all-in-one file functions such as readfile(), file(), and file_get_contents() where there is otherwise no opportunity to apply a filter to the stream prior the contents being read.

The php://filter target takes the following 'parameters' as parts of its 'path'.

  • /resource=<stream to be filtered> (required) This parameter must be located at the end of your php://filter specification and should point to the stream which you want filtered.

    /* This is equivalent to simply:
       since no filters are actually specified */


  • /read=<filter list to apply to read chain> (optional) This parameter takes one or more filternames separated by the pipe character |.

    /* This will output the contents of entirely in uppercase */

    /* This will do the same as above
       but will also ROT13 encode it */

  • /write=<filter list to apply to write chain> (optional) This parameter takes one or more filternames separated by the pipe character |.

    /* This will filter the string "Hello World"
       through the rot13 filter, then write to
       example.txt in the current directory */
    file_put_contents("php://filter/write=string.rot13/resource=example.txt","Hello World");

  • /<filter list to apply to both chains> (optional) Any filter lists which are not prefixed specifically by read= or write= will be applied to both the read and write chains (as appropriate).

The php://memory wrapper stores the data in the memory. php://temp behaves similarly, but uses a temporary file for storing the data when a certain memory limit is reached (the default is 2 MB).

The php://temp wrapper takes the following 'parameters' as parts of its 'path':

  • /maxmemory:<number of bytes> (optional). This parameter allows changing the default value for the memory limit (when the data is moved to a temporary file).

    1024 1024;
    $fp fopen("php://temp/maxmemory:$fiveMBs"'r+');


    // read what we have written

Wrapper Summary (For php://filter, refer to summary of wrapper being filtered.)
Attribute Supported
Restricted by allow_url_fopen No
Restricted by allow_url_include php://input, php://stdin, php://memory and php://temp only.
Allows Reading php://stdin, php://input, php://memory and php://temp only.
Allows Writing php://stdout, php://stderr, php://output, php://memory and php://temp only.
Allows Appending php://stdout, php://stderr, php://output, php://memory and php://temp only. (Equivalent to writing)
Allows Simultaneous Reading and Writing php://memory and php://temp only.
Supports stat() php://memory and php://temp only.
Supports unlink() No
Supports rename() No
Supports mkdir() No
Supports rmdir() No

ThaiCreate.Com Forum

Comunity Forum Free Web Script
Jobs Freelance Free Uploads
Free Web Hosting Free Tools

สอน PHP ผ่าน Youtube ฟรี
สอน Android การเขียนโปรแกรม Android
สอน Windows Phone การเขียนโปรแกรม Windows Phone 7 และ 8
สอน iOS การเขียนโปรแกรม iPhone, iPad
สอน Java การเขียนโปรแกรม ภาษา Java
สอน Java GUI การเขียนโปรแกรม ภาษา Java GUI
สอน JSP การเขียนโปรแกรม ภาษา Java
สอน jQuery การเขียนโปรแกรม ภาษา jQuery
สอน .Net การเขียนโปรแกรม ภาษา .Net
Free Tutorial
สอน Google Maps Api
สอน Windows Service
สอน Entity Framework
สอน Android
สอน Java เขียน Java
Java GUI Swing
สอน JSP (Web App)
iOS (iPhone,iPad)
Windows Phone
Windows Azure
Windows Store
Laravel Framework
Yii PHP Framework
สอน jQuery
สอน jQuery กับ Ajax
สอน PHP OOP (Vdo)
Ajax Tutorials
SQL Tutorials
สอน SQL (Part 2)
JavaScript Tutorial
Javascript Tips
VBScript Tutorial
VBScript Validation
Microsoft Access
MySQL Tutorials
-- Stored Procedure
MariaDB Database
SQL Server Tutorial
SQL Server 2005
SQL Server 2008
SQL Server 2012
-- Stored Procedure
Oracle Database
-- Stored Procedure
SVN (Subversion)
แนวทางการทำ SEO

Hit Link

Load balance : Server 05
ThaiCreate.Com Logo
© www.ThaiCreate.Com. 2003-2024 All Rights Reserved.
ไทยครีเอทบริการ จัดทำดูแลแก้ไข Web Application ทุกรูปแบบ (PHP, .Net Application, VB.Net, C#)
[Conditions Privacy Statement] ติดต่อโฆษณา 081-987-6107 อัตราราคา คลิกที่นี่