Trying to Load Compiled Extension

Hello, fellow developers: Information, documentation and tutorials about creating PHP extensions online is rather scarce, but I was able to pull together a few tutorials and build an extension. You can download and view the source code from http://www.dnscrawler.com/rawsockets.tar.gz. I compile it as follows: phpize ./configure --with-rawsockets make make install for RedHat EL 5 and phpize ./configure --with-rawsockets --with-php-config=/usr/bin/php-config make make install for Mac OS X Snow Leopard 10.6.2. It compiles without error and says that the extension has been copied to the proper directory. However, if I try to load the extension either with dl('rawsockets.so') or extension=rawsockets.so in the INI file, I get the error "PHP Warning: PHP Startup: Invalid library (maybe not a PHP library) 'rawsockets.so' in Unknown on line 0 phpinfo()". If, per some suggestions I found online, I try to load it with zend_extension=/usr/lib/php5/extensions/rawsockets.so, I get the error "/usr/lib/php5/extensions/rawsockets.so doesn't appear to be a valid Zend extension." I'm going to back off a bit on this and start with a simple "Hello, World" extension (I know, I probably should have done that first), but while I do that, I would really appreciate some input as to why this compiles without any errors OR warnings but doesn't load with a cryptic, unhelpful error message. I did run strace php -i and got the following output related to my extension: open("/usr/lib/php5/extensions/rawsockets.so", O_RDONLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 \3\0\0004\0\0\0"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0755, st_size=7757, ...}) = 0 mmap2(NULL, 8212, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb7b6c000 fadvise64(3, 0, 8212, POSIX_FADV_WILLNEED) = 0 mmap2(0xb7b6d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xb7b6d000

close(3)                                = 0

mprotect(0xb7b6d000, 4096, PROT_READ) = 0

munmap(0xb7b6c000, 8212)                = 0
write(2, "PHP Warning:  PHP Startup: Inval"..., 107PHP Warning:  PHP Startup: Invalid library (maybe not a PHP library) 'rawsockets.so'  in Unknown on line 0

) = 107 Thanks for your help in advance, Nick