URL = "http://localhost:2424";
    URL = URL + "/get";

    ArrayParam = New Array;
    ArrayParam.Add("val1");
    ArrayParam.Add("val2");
    ArrayParam.Add("val3");

    ParametersStructure = New Structure("arrayfield", ArrayParam);

    Separation = OPI_HTTPRequests.NewRequest()
        .Initialize("https://example.com/page")
        .SetURLParams(ParametersStructure)
        .SplitArraysInURL(True) // <---
        .ProcessRequest("GET", False)
        .ReturnRequest()
        .ResourceAddress;

    SeparationPhp = OPI_HTTPRequests.NewRequest()
        .Initialize("https://example.com/page")
        .SetURLParams(ParametersStructure)
        .SplitArraysInURL(True, True) // <---
        .ProcessRequest("GET", False)
        .ReturnRequest()
        .ResourceAddress;

    NoSeparation = OPI_HTTPRequests.NewRequest()
        .Initialize("https://example.com/page")
        .SetURLParams(ParametersStructure)
        .ProcessRequest("GET", False)
        .ReturnRequest()
        .ResourceAddress;