Description:
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I'm not aware of any "real" scalar type in php.  I believe the author intended to say "float" in this context.

Reproduce code:
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http://us.php.net/manual/en/ref.SCA.php

Expected result:
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SCA components can pass and return the four PHP scalar types boolean, integer, float and string, but to pass or return data structures, SCA components use Service Data Objects (SDOs). 

Actual result:
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SCA components can pass and return the four PHP scalar types boolean, integer, real and string, but to pass or return data structures, SCA components use Service Data Objects (SDOs).