explode string with promos php

$string = "La maison est belle";
    $array = explode(" ", $string);
    var_dump($array);
    
    /* array(3) {
    [0]=>
    string(3) "La"
    [1]=>
    string(7) "maison"
    [2]=>
    string(5) "est"
    [3]=>
    string(6) "belle"
    } */