PHP: Patterns, that could profit from source code discovery

[felix-20]

In PHP, there are a few patterns, that cannot be discovered using opcode, as the tarpit is not present in opcode anymore.
Therfor I think these patterns could profit from a discovery method, that uses the PHP source code rather than the opcode.

This affects PHP patterns:

• 5_combined_operator
• 40_trait
• 47_overriding
• 48_construct_with_inheritance
• 55_goto
• 80_callback_functions