resolved some conflicts for PHP

Rev: src/builtin_functions.h:1.10
Rev: src/errors.h:1.7
Rev: src/interpret.h:1.35
Rev: src/interpreter.h:1.18
Rev: src/lexer.h:1.11
Rev: src/preprocessor.h:1.15
Rev: src/program.c:1.174
Rev: src/program.h:1.66
Rev: src/security.h:1.8
Rev: src/svalue.h:1.38
Rev: src/threads.h:1.71