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

            )

)