Get first value of an array

Question

I have an array:

Array (
[0] => Array
    (
        [0] => Pen
        [1] => Apple
    )

[1] => Array
    (
        [0] => Oooo
        [1] => Pineapple pen
    )

How I can get a first elements of each array?

For example: Pen Oooo

It's my function

$parameters = array('wiki_1', 'wiki_2', 'wiki_3', 'wiki_4','wiki_5' ,'wiki_6', 'wiki_7', 'wiki_8', 'wiki_9', 'wiki_10', 'wiki_11', 'wiki_12');

function wiki_custom_fields( $parameters, $id ) {
        foreach ($parameters as $parameter) {
           $wiki_result[] = get_post_custom_values($parameter, $id, true);
        }

    echo '<pre>';
    print_r($wiki_result);
    echo '</pre>';
}

If I use print_r($wiki_result[][0]); it's get 500 Error.

Solution 1

You can use array_column function

$array =  array(
    array('Pen', 'Apple' ),
    array('Oooo', 'Pineapple pen')
);

$result = array_column($array, 0);

echo '<pre>';
print_r($result);
echo '</pre>';

Output:

Array
(
    [0] => Pen
    [1] => Oooo
)

Solution 2

Use reset http://php.net/manual/es/function.reset.php

This function sets the internal pointer of the array to first element and also returns it.

$first = reset($array)