(PHP 4 >= 4.0.6, PHP 5)
mb_output_handler — Callback function converts character encoding in output buffer
mb_output_handler() is ob_start() callback function. mb_output_handler() converts characters in the output buffer from internal character encoding to HTTP output character encoding.
The contents of the output buffer.
The status of the output buffer.
The converted string.
This handler now adds the charset HTTP header when the following conditions are met:
Example #1 mb_output_handler() example
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().