Yii2 yii\console\widgets\Table to markdown style to output.

gistfile1.txt

$table->setListPrefix('');
$table->setChars([
    Table::CHAR_TOP => '',
    Table::CHAR_TOP_MID => '',
    Table::CHAR_TOP_LEFT => '',
    Table::CHAR_TOP_RIGHT => '',
    Table::CHAR_BOTTOM => '',
    Table::CHAR_BOTTOM_MID => '',
    Table::CHAR_BOTTOM_LEFT => '',
    Table::CHAR_BOTTOM_RIGHT => '',
    Table::CHAR_LEFT => '|',
    Table::CHAR_LEFT_MID => '|',
    Table::CHAR_MID => '-',
    Table::CHAR_MID_MID => '|',
    Table::CHAR_RIGHT => '|',
    Table::CHAR_RIGHT_MID => '|',
    Table::CHAR_MIDDLE => '|',
]);