I'm trying to install php from source with following command
./configure --prefix=/www/php --with-apxs2=/www/bin/apxs --with-config-filepath=/www/php --enable-sockets --with-mysql=/usr/local/mysql --with-zlibdir=/usr/include –with-gd
its giving me the following error.

[root@dd-wrt php-4.3.11]# make install
Installing PHP SAPI module: apache2handler
/www/build/instdso.sh SH_LIBTOOL='/www/build/libtool' libphp4.la /www/modules
/www/build/libtool --mode=install cp libphp4.la /www/modules/
cp .libs/libphp4.lai /www/modules/libphp4.la
cp .libs/libphp4.a /www/modules/libphp4.a
ranlib /www/modules/libphp4.a
chmod 644 /www/modules/libphp4.a
libtool: install: warning: remember to run `libtool --finish /root/cacti-install/php-4.3.11/libs'
Warning! dlname not found in /www/modules/libphp4.la.
Assuming installing a .so rather than a libtool archive.
chmod 755 /www/modules/libphp4.so
chmod: cannot access `/www/modules/libphp4.so': No such file or directory
apxs:Error: Command failed with rc=65536

Here's my PHP configure line:

./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql=/usr/local/mysql --with-apache2 --with-config-file-path=/usr/local/lib --with-gd --with-zlib --with-zlib-dir=/home/monitor/cvs-1.11.5/zlib/ --with-jpeg-dir=/home/stefan/jpeglib --with-png-dir=/home/stefan/pnglib --with-tiff-dir=/home/stefan/tiff --with-freetype-dir=/home/stefan/freetype-2.1.10 --with-libxml-dir=/home/stefan/libxml2-2.6.19 --with-java=/usr/java/j2sdk1.4.2_05/ --with-pear=/usr/local/lib/php --with-dom --enable-sockets --enable-ftp --enable-gd-native-ttf --enable-dbx --enable-shmop --enable-filepro --enable-bcmath --enable-calendar --enable-dio --enable-exif --with-fam --enable-mbstring --enable-soap --enable-wddf --enable-yp --enable-zend-multibyte --enable-force-cgi-redirect --enable-safe-mode --enable-versioning --enable-url-includes --enable-trans-sid --with-ldap --enable-discard-path --with-mcal --with-mod-dav --with-kerberos --enable-gd-imgstrttf --with-gdbm --with-gettext --disable-cgi --with-openssl --with-zip

Note that my --with-apxs2 refers to my installed Apache instance's directory... might this be the problem? Your's doesn't seem to...

no my --with-apxs2 is also pointing to apache folder.

/www/modules/libphp4.so find that file in your hd or create a soft link to the existing file and you'll be on your way. for example if you have a library called libphph4.so.1 make a soft link ln -s /xxx/yyy/libphp4.so.1 /www/modules/libphp4.so and should work.