PHP-style utility functions for LuaJIT applications

1. trim
2. rtrim
3. ltrim
4. split
5. explode
6. ip2long
7. long2ip
8. ctype_upper
9. ctype_lower
10. ctype_alpha
11. ctype_alnum
12. ctype_lower
13. ctype_digit
14. addslashes
15. stripslashes

gcc -O3 -shared -fPIC -I/usr/local/include/luajit-2.0/   -c -o php.o php.c
gcc -O3 -shared -fPIC -I/usr/local/include/luajit-2.0/ -ansi -pedantic -Wall -o php.so php.o

luajit-2.0.2 test.lua