[rao@localhost ~]$ php -i|grep configure
Configure Command => './configure'
'--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu'
'--target=x86_64-redhat-linux-gnu' '--program-prefix='
'--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin'
'--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share'
'--includedir=/usr/include' '--libdir=/usr/lib64'
'--libexecdir=/usr/libexec' '--localstatedir=/var'
'--sharedstatedir=/usr/com' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--cache-file=../config.cache'
'--with-libdir=lib64' '--with-config-file-path=/etc'
'--with-config-file-scan-dir=/etc/php.d' '--disable-debug'
'--with-pic' '--disable-rpath' '--without-pear' '--with-bz2'
'--with-curl' '--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr'
'--with-png-dir=/usr' '--enable-gd-native-ttf' '--without-gdbm'
'--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-dir=/usr'
'--with-openssl' '--with-png' '--with-pspell'
'--with-expat-dir=/usr' '--with-pcre-regex=/usr' '--with-zlib'
'--with-layout=GNU' '--enable-exif' '--enable-ftp'
'--enable-magic-quotes' '--enable-sockets' '--enable-sysvsem'
'--enable-sysvshm' '--enable-sysvmsg' '--enable-track-vars'
'--enable-trans-sid' '--enable-yp' '--enable-wddx'
'--with-kerberos' '--enable-ucd-snmp-hack'
'--with-unixODBC=shared,/usr' '--enable-memory-limit'
'--enable-shmop' '--enable-calendar' '--enable-dbx' '--enable-dio'
'--with-mime-magic=/usr/share/file/magic.mime' '--without-sqlite'
'--with-libxml-dir=/usr' '--with-xml' '--with-system-tzdata'
'--enable-force-cgi-redirect' '--enable-pcntl' '--with-imap=shared'
'--with-imap-ssl' '--enable-mbstring=shared'
'--enable-mbstr-enc-trans' '--enable-mbregex'
'--with-ncurses=shared' '--with-gd=shared' '--enable-bcmath=shared'
'--enable-dba=shared' '--with-db4=/usr' '--with-xmlrpc=shared'
'--with-ldap=shared' '--with-ldap-sasl' '--with-mysql=shared,/usr'
'--with-mysqli=shared,/usr/bin/mysql_config' '--enable-dom=shared'
'--with-dom-xslt=/usr' '--with-dom-exslt=/usr'
'--with-pgsql=shared' '--with-snmp=shared,/usr'
'--enable-soap=shared' '--with-xsl=shared,/usr'
'--enable-xmlreader=shared' '--enable-xmlwriter=shared'
'--enable-fastcgi' '--enable-pdo=shared'
'--with-pdo-odbc=shared,unixODBC,/usr'
'--with-pdo-mysql=shared,/usr' '--with-pdo-pgsql=shared,/usr'
'--with-pdo-sqlite=shared,/usr' '--enable-dbase=shared'