Union() in Php

[samiazmi]

Hi list,

I too am getting the same error, can you please tell me any solution for
this Union problem its giving this error

Call to undefined method ms_shape_obj::Union()

How can we use union method in php? Please help, rest all methods like
intersection and others are working fine, but only union is giving problems. 

  shapeobj Union(shapeobj shape)
        Returns a shape object representing the union of the current shape
object with the one passed as parameter. Only available if php/mapscript is
built with GEOS library.

This is the help mentioned in the document and it is used the same way still
it is giving problems. The mapserver i am using is having GEOS, so thats not
the problem. can any one post a tested piece of union that works that will
be really very helpful

Thanks in advance

Sami
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