mb_output_handler Callback function converts character encoding in output buffer &reftitle.description; stringmb_output_handler stringstring intstatus 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. &reftitle.parameters; string The contents of the output buffer. status The status of the output buffer. &reftitle.returnvalues; The converted string. &reftitle.examples; ]]> &reftitle.notes; 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. &reftitle.seealso; ob_start