PHP simplexls-获取列标题，但没有单元格数据

使用simplexls类v0.4运行PHP v.3.10，加载电子表格后，维度（即行和列计数）将关闭。

这些行确实包含列标题，但即使电子表格中有数据，所有数据行都是空的。

以下是输出的小样本，用于说明。你知道为什么我没有得到任何实际的细胞数据吗？

Array
(
    [0] => cheyco.xlsx
)
Sheets count is: 7
i = 1:
Dimensions(1) returns:
Array
(
    [0] => 4
    [1] => 5
)
Rows(1) returns:
Array
(
    [0] => Array
        (
            [0] => Facility Code
            [1] => Site ID
            [2] => Name
            [3] => Description
        )
    [1] => Array
        (
            [0] =>
        )
    [2] => Array
        (
            [2] =>
        )
)
i = 2:
Dimensions(2) returns:
Array
(
    [0] => 5
    [1] => 29
)
Rows(2) returns:
Array
(
    [0] => Array
        (
            [0] => Unit Code
            [1] => Facility Code
            [2] => Type (I,E,O)
            [3] => Name
            [4] => Description
        )
    [1] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )
    [2] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )
    [3] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )
    [4] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )
    [5] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )
    [6] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )
    [7] => Array
        (
            [0] =>
            [1] =>
            [3] =>
        )