Cannot modify header information - headers already sent by (output started at /home/stressre/public_html/index.php:1)

2

Array
(
    [0] => Array
        (
            [file] => /home/stressre/public_html/wp-content/fatal-error-handler.php
            [line] => 18
            [function] => format_error
            [class] => WPSE_Fatal_Error_Handler
            [type] => ->
            [args] => Array
                (
                    [0] => 2
                    [1] => Cannot modify header information - headers already sent by (output started at /home/stressre/public_html/index.php:1)
                    [2] => /home/stressre/public_html/wp-includes/pluggable.php
                    [3] => 1254
                )

        )

    [1] => Array
        (
            [function] => handle
            [class] => WPSE_Fatal_Error_Handler
            [type] => ->
            [args] => Array
                (
                )

        )

)