License compatibility: matrix available?

[Marc Laporte]

Hello,

OSI has a nice clear list of licenses: http://opensource.org/licenses/

How do I know if a license is compatible with an other?

For example, I understand that I may use LGPL code in a GPL application. 
However, I may not use GPL code in a LGPL application. How about the PHP 
license? Apache? BSD? etc

Thank you for any info or links on this matter.

Best regards,

-- 
M ;-)

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