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(PHP 4 >= 4.0.6, PHP 5, PHP 7)

mb_output_handlerCallback function converts character encoding in output buffer


string mb_output_handler ( string $contents , int $status )

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.

Elenco dei parametri


The contents of the output buffer.


The status of the output buffer.

Valori restituiti

The converted string.

Log delle modifiche

Versione Descrizione

This handler now adds the charset HTTP header when the following conditions are met:

  • Content-Type has not been set, using header().
  • The default MIME type begins with text/.
  • The mbstring.http_input setting is something other than pass.


Example #1 mb_output_handler() example




If you want to output binary data, such as an image, a Content-Type: header must be set using header() before any binary data is sent to the client (e.g. header("Content-Type: image/png")). If Content-Type: header is sent, output character encoding conversion will not be performed.

Note that if 'Content-Type: text/*' is sent, the content body is regarded as text; conversion will take place.

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