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<h3>intersects function</h3>
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Returns 1 if the geometries spatially intersect (share any portion of space) and 0 if they don't.
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<h4>Syntax</h4>
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<pre>intersects( a, b )</pre>
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<h4>Arguments</h4>
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a → geometry
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b → geometry
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<h4>Example</h4>
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<pre> intersects( geomFromWKT( 'POINT(4 4)' ) , geomFromWKT( 'LINESTRING(3 3 , 4 4 , 5 5)' )) → returns 1</pre>
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<pre> intersects( geomFromWKT( 'POINT(4 5)' ) , geomFromWKT( 'POINT(5 5)' )) → returns 0</pre>
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