Multibyte String
PHP Manual

mb_output_handler

(PHP 4 >= 4.0.6, PHP 5)

mb_output_handler — Callback function converts character encoding in output buffer

Description

string mb_output_handler ( string $contents , int $status )

mb_output_handler() is ob_start() callback function. mb_output_handler() converts characters in output buffer from internal character encoding to HTTP output character encoding.

4.1.0 or later version, this handler adds charset HTTP header when following conditions are met:

contents : Output buffer contents

status : Output buffer status

Return Value: String converted

Example#1 mb_output_handler() example

<?php
mb_http_output
("UTF-8");
ob_start("mb_output_handler");
?>

Note: If you want to output some binary data such as image from PHP script with PHP 4.3.0 or later, Content-Type: header must be send using header() before any binary data was send to client (e.g. header("Content-Type: image/png")). If Content-Type: header was send, output character encoding conversion will not be performed.
Note that if 'Content-Type: text/*' was send using header(), the sending data is regarded as text, encoding conversion will be performed using character encoding settings.
If you want to output some binary data such as image from PHP script with PHP 4.2.x or earlier, you must set output encoding to "pass" using mb_http_output().

See also ob_start().


Multibyte String
PHP Manual