Как получить столбец в виде плоского индексированного массива из двумерного массива [дубликат] ⇐ Php

[Anonymous]

У меня есть такой массив:
Array ( [1] => Array ( [A] => MEMBER EMAIL
=> MEMBER GENDER (M/F)
[C] => COMPANY ID
[D] => COUNTRY
[E] => DOB
[F] => MOBILE NUMBER
[G] => ADDRESS
[H] => POINTS
=> STATUS )
[2] => Array ( [A] => tollars@mailinator.com
=> M
[C] => 1
[D] => Indonesia
[E] => 1998-05-02
[F] => 8734683784
[G] => Address Here
[H] => 100
=> 1 )
[3] => Array ( [A] => tollars2@mailinator.com
=> F
[C] => 9
[D] => Singapore
[E] => 1998-05-02
[F] => 94598859430
[G] => Address Here
[H] => 10
=> 1 )
)

Я хочу стать вот таким
array(
"MEMBER EMAIL ",
"tollars@mailinator.com",
"tollars2@mailinator.com"
)