php interview questions

flush -- Flush the output buffer

ob_clean -- Clean (erase) the output buffer

ob_end_clean -- Clean (erase) the output buffer and turn off output buffering

ob_end_flush -- Flush (send) the output buffer and turn off output buffering

ob_flush -- Flush (send) the output buffer

ob_get_clean -- Get current buffer contents and delete current output buffer

ob_get_contents -- Return the contents of the output buffer

ob_get_flush -- Flush the output buffer, return it as a string and turn off output buffering

ob_get_length -- Return the length of the output buffer

ob_get_level -- Return the nesting level of the output buffering mechanism

ob_get_status -- Get status of output buffers

ob_gzhandler -- ob_start callback function to gzip output buffer

ob_implicit_flush -- Turn implicit flush on/off

ob_list_handlers -- List all output handlers in use

ob_start -- Turn on output buffering

output_add_rewrite_var -- Add URL rewriter values

output_reset_rewrite_vars -- Reset URL rewriter values