我需要删除集合中存在的具有相同array（）的所有子数组。 在此数组示例中，只有key [3]在每个数组中都有唯一值。我试过array_unique但是没有用。
返回数组中我猜的不同值的位置。
Array
(
[0] => Array
(
[0] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Aperture Size
[GroupId] => 46
[Id] => 1344
[MiscText] =>
[SortOrder] => 0
[Value] => 253mm x 40mm
)
[1] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 650
[MiscText] => Table
[SortOrder] => 1
[Value] => Letterplate seal
)
[2] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 661
[MiscText] => Table
[SortOrder] => 1
[Value] => Brown (BW)
)
[3] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Fixing Centres
[GroupId] => 87
[Id] => 2047
[MiscText] =>
[SortOrder] => 0
[Value] => 275mm
)
[4] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Overall Size
[GroupId] => 45
[Id] => 1329
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
[5] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Size
[GroupId] => 31
[Id] => 1032
[MiscText] => Table
[SortOrder] => 2
[Value] => Letterplate seal
)
[6] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Product Type
[GroupId] => 18
[Id] => 266
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
)
[1] => Array
(
[0] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Aperture Size
[GroupId] => 46
[Id] => 1344
[MiscText] =>
[SortOrder] => 0
[Value] => 253mm x 40mm
)
[1] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 650
[MiscText] => Table
[SortOrder] => 1
[Value] => Letterplate seal
)
[2] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 710
[MiscText] => Table
[SortOrder] => 1
[Value] => Gold (GD)
)
[3] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Fixing Centres
[GroupId] => 87
[Id] => 2047
[MiscText] =>
[SortOrder] => 0
[Value] => 275mm
)
[4] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Overall Size
[GroupId] => 45
[Id] => 1329
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
[5] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Size
[GroupId] => 31
[Id] => 1032
[MiscText] => Table
[SortOrder] => 2
[Value] => Letterplate seal
)
[6] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Product Type
[GroupId] => 18
[Id] => 266
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
)
[2] => Array
(
[0] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Aperture Size
[GroupId] => 46
[Id] => 1344
[MiscText] =>
[SortOrder] => 0
[Value] => 253mm x 40mm
)
[1] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 650
[MiscText] => Table
[SortOrder] => 1
[Value] => Letterplate seal
)
[2] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 658
[MiscText] => Table
[SortOrder] => 1
[Value] => Silver (SE)
)
[3] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Fixing Centres
[GroupId] => 87
[Id] => 2047
[MiscText] =>
[SortOrder] => 0
[Value] => 275mm
)
[4] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Overall Size
[GroupId] => 45
[Id] => 1329
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
[5] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Size
[GroupId] => 31
[Id] => 1032
[MiscText] => Table
[SortOrder] => 2
[Value] => Letterplate seal
)
[6] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Product Type
[GroupId] => 18
[Id] => 266
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
)
[3] => Array
(
[0] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Aperture Size
[GroupId] => 46
[Id] => 1344
[MiscText] =>
[SortOrder] => 0
[Value] => 253mm x 40mm
)
[1] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 650
[MiscText] => Table
[SortOrder] => 1
[Value] => Letterplate seal
)
[2] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Finish
[GroupId] => 24
[Id] => 613
[MiscText] => Table
[SortOrder] => 1
[Value] => White (WH)
)
[3] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Fixing Centres
[GroupId] => 87
[Id] => 2047
[MiscText] =>
[SortOrder] => 0
[Value] => 275mm
)
[4] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Overall Size
[GroupId] => 45
[Id] => 1329
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
[5] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Size
[GroupId] => 31
[Id] => 1032
[MiscText] => Table
[SortOrder] => 2
[Value] => Letterplate seal
)
[6] => Array
(
[Category] => Filters
[CategoryId] => 1
[Group] => Product Type
[GroupId] => 18
[Id] => 266
[MiscText] =>
[SortOrder] => 0
[Value] => Letterplate seal
)
)
> )