xdebug.auto_trace=1 ; enable tracing xdebug.trace_output_dir=/tmp ; trace output directory xdebug.trace_output_name=crc32 ; tracefile extension xdebug.collect_params=0 ; parameter collection xdebug.collect_includes=1 ; collecting includes xdebug.extended_info=0 ; extended code generation xdebug.show_mem_delta=1 ; memory difference