How Do I Merge Three Columns From A Csv File To Give Me A Single Column With Php

I am importing a CSV file that has 3 adjacent columns lets call them Size, Color and Item. I need to combine these columns and have one long column that has all these value WHILST stripping out the rows that have a no content in them.

I am still having trouble combining the two thus far.

Have tried array_merge and so forth but i get no love.

$a = array($data[4]);
$b = array($data[5]);
$result = array_me开发者_开发问答rge((array)$a, (array)$b);
print_r($result);

with $data[4] and $data[5] being the csv columns

my result is:

Array (
    [0] => Size
    [1] => Colour
)
Array (
    [0] => Large
    [1] => Black
)
Array (
    [0] => Medium
    [1] => Black
)
Array (
    [0] => Small
    [1] => Black
)
Array (
    [0] => Extra Small
    [1] => Black
)
Array (
    [0] => Large
    [1] => White
)
Array (
    [0] => Medium
    [1] => White
)
Array (
    [0] => Small
    [1] => White
)
Array (
    [0] => Extra Small
    [1] => White
)
Array (
    [0] => 
    [1] =>
)

I would like something like

Array (
    [0] => Size
    [1] => Large
    [2] => Medium
    [3] => Small
    [4] => Extra Small
    [5] => Black
    [6] => Black
    etc....
)

could you push the data onto the $result stack? e.g.

$result = array();
$result[] = $data[3];
$result[] = $data[4];
.. etc