in php-3 configure uses tr like this:
tr -c -d a-zA-Z0-9

In Solaris 8 this will no longer work as support for 
syntax like a-zA-Z0-9 has been dropped from /usr/bin/tr.

Above like use of /usr/bin/tr in configure will result to
miscellanious compilation failures.

A fix would be to use tr syntax like this:
tr -c -d '[a-z][A-Z][0-9]'

This sed line will change the use of tr:
sed "s/tr -c -d a\-zA\-Z0\-9/tr -c -d \'\[a\-z\]\[A\-Z\]\[0\-9\]\'/g" configure