- ob_start: documentation ( source)
- register_shutdown_function: documentation ( source)
<?php
register_shutdown_function( 'shutdown_func' );
function ob_callback( $buffer ) {
$buffer .= __FUNCTION__ . ' ';
return $buffer;
}
function shutdown_func() {
echo __FUNCTION__ . ' ';
}
ob_start( 'ob_callback' );