<?php
    $cars = array("Volvo", "BMW", "Toyota");
    ?>


    <form name="excel_upload" id="excel_upload" action="" method="post">
    <input type="hidden" name="data[]"  >
    <input type="submit">
    </form>

<?php
    $cars = array("Volvo", "BMW", "Toyota");
    ?>


    <form name="excel_upload" id="excel_upload" action="" method="post">
    <input type="hidden" name="data[]" value="<?php print_r($table); ?>" >
                        <input type="submit">
    </form>