Reference: http://ajaxweb.wikidot.com/php-installation-fails-missing-dll

Every time I tried to run php.exe or php-win.exe I got popups complaining of a heap of missing DLL's
gds32.dll
ntwdblib.dll
oci.dll

etc...

As the above link says you need to run php.exe and note the error messages as it will tell you which extension to disable. Keep running php.exe until you have a clear screen. You need to CTRL+C out of php.exe to continue.

In the end I edited php.ini as follows to remove all the complaints

[PHP_BZ2]
extension=php_bz2.dll
[PHP_CURL]
extension=php_curl.dll
[PHP_DBA]
extension=php_dba.dll
[PHP_DBASE]
extension=php_dbase.dll
[PHP_FDF]
extension=php_fdf.dll
[PHP_GD2]
extension=php_gd2.dll
[PHP_GETTEXT]
extension=php_gettext.dll
[PHP_GMP]
extension=php_gmp.dll
[PHP_IMAP]
extension=php_imap.dll
[PHP_INTERBASE]
;extension=php_interbase.dll
[PHP_LDAP]
extension=php_ldap.dll
[PHP_MBSTRING]
extension=php_mbstring.dll
[PHP_MCRYPT]
extension=php_mcrypt.dll
[PHP_MHASH]
extension=php_mhash.dll
[PHP_MIME_MAGIC]
extension=php_mime_magic.dll
[PHP_MING]
extension=php_ming.dll
[PHP_MSQL]
extension=php_msql.dll
[PHP_MSSQL]
;extension=php_mssql.dll
[PHP_MYSQL]
extension=php_mysql.dll
[PHP_MYSQLI]
extension=php_mysqli.dll
[PHP_OCI8]
;extension=php_oci8.dll
[PHP_OPENSSL]
extension=php_openssl.dll
[PHP_PDO]
extension=php_pdo.dll
[PHP_PDO_FIREBIRD]
;extension=php_pdo_firebird.dll
[PHP_PDO_MSSQL]
;extension=php_pdo_mssql.dll
[PHP_PDO_MYSQL]
extension=php_pdo_mysql.dll
[PHP_PDO_OCI]
;extension=php_pdo_oci.dll
[PHP_PDO_OCI8]
;extension=php_pdo_oci8.dll
[PHP_PDO_ODBC]
extension=php_pdo_odbc.dll
[PHP_PDO_PGSQL]
;extension=php_pdo_pgsql.dll
[PHP_PDO_SQLITE]
extension=php_pdo_sqlite.dll
[PHP_PDO_SQLITE_EXTERNAL]
;extension=php_pdo_sqlite_external.dll
[PHP_PGSQL]
;extension=php_pgsql.dll
[PHP_PSPELL]
;extension=php_pspell.dll
[PHP_SHMOP]
extension=php_shmop.dll
[PHP_SNMP]
;extension=php_snmp.dll
[PHP_SOAP]
extension=php_soap.dll
[PHP_SOCKETS]
extension=php_sockets.dll
[PHP_SQLITE]
extension=php_sqlite.dll
[PHP_SYBASE_CT]
;extension=php_sybase_ct.dll
[PHP_TIDY]
extension=php_tidy.dll
[PHP_XMLRPC]
extension=php_xmlrpc.dll
[PHP_XSL]
extension=php_xsl.dll
[PHP_ZIP]
extension=php_zip.dll
[PHP_EXIF]
extension=php_exif.dll