Fatal error: Call to undefined function oci_connect()

php oracle iis oracle-call-interface instantclient

Things to check:

You don't need to set LD_LIBRARY_PATH nor ORACLE_HOME. However, you need to add D:\instantclient_11_2 to the PATH environmental variable and restart the computer so changes apply.
Before configuring PHP, check that your Oracle client libraries actually work (for instance, try to connect with SQL Developer).
Comment out the extension=php_oracle.dll. It belongs to the old and deprecated Oracle extension.
Double check that the php_oci8.dll file is really at c:\php\ext\php_oci8.dll?

php oracle iis oracle-call-interface instantclient

Did you restart apache after putting the php_oci8.dll file in your php/ext directory?

php oracle iis oracle-call-interface instantclient

Just add this line to the php.in file that point to the location of extensions, should know where they are located, but normally in php folder.

extension_dir = C:\xampp\php\ext ;this is for me using xampp, be wise.

It worked for me. The problem is with accessing the extensions and has nothing to do with oracle libraries.

CodeHunter