I just installed PHP 4.0.4pl1, along with Apache 1.3.17.  I know very little about PHP at this point, and therefore changed nothing in the php.ini file.  This also means that I haven't actually tried any .php files yet, I'm simply sticking to .html thus far.  I assume it should still work though, shouldn't it?  I compiled PHP with APXS and MySQL, but nothing more.  Everytime I start Apache up and try to fetch a file from it, the PHP module causes(?) a segmentation fault error and crashes that particular httpd process.  Usually, I believe it works for the first request after I completely restart all of the httpd processes, but I'm not sure about that.  It does happen every time after that though, until I restart the processes.  The backtrace I got is as follows:

#0  0x401f7bc5 in ?? () from /usr/local/apache/libexec/libphp4.so
#1  0x8099869 in ap_invoke_handler ()
#2  0x80ae32f in process_request_internal ()
#3  0x80ae796 in ap_internal_redirect ()
#4  0x8073fac in handle_dir ()
#5  0x8099869 in ap_invoke_handler ()
#6  0x80ae32f in process_request_internal ()
#7  0x80ae39a in ap_process_request ()
#8  0x80a52f6 in child_main ()
#9  0x80a54b1 in make_child ()
#10 0x80a562c in startup_children ()
#11 0x80a5c9c in standalone_main ()
#12 0x80a64cc in main ()
#13 0x400dbcae in __libc_start_main () from /lib/libc.so.6

Anyway, if there is any other information that you need, please feel free to contact me.  Thank you for your help!