sort array on specific value with php

I have an array with specific values in it and i would like to sort the array on a specific value in it. For instance, TOTCOM_METIER DESC.
Ex :

Array
(

[0] => Array
    (
        [TOTCOM_METIER] => 1
        [metier] => Traiteur
    )

[1] => Array
    (
        [TOTCOM_METIER] => 4
        [metier] => Restauration traditionnelle

    )

[2] => Array
    (
        [TOTCOM_METIER] => 2
        [metier] => Coiffure
    )

)

I would like to sort it on TOTCOM_METIER DESC to have this result :

Array
(
[0] => Array
    (
        [TOTCOM_METIER] => 4
        [metier] => Restauration traditionnelle
    )


[1] => Array
    (
        [TOTCOM_METIER] => 2
        [metier] => Coiffure
    )

[2] => Array
    (
        [TOTCOM_METIER] => 1

        [metier] => Traiteur
    )

)