How do I add or remove built-in extensions to or from the PHP runtime? - Function Compute

Common extensions are built in the PHP runtime of Function Compute. The built-in extensions can be added or removed based on your business requirements. This topic describes how to add or remove a built-in extension to or from the PHP runtime.

This topic describes how to remove a built-in extension from the PHP runtime environment. In this example, the protobuf built-in extension is removed. For more information about the built-in extensions supported by the Function Compute PHP runtime, see Built-in PHP packages.

Create the extension directory in the same directory as the function entry file. The following sample code describes the directory structure:
```
.
|____extension
| |____my_ext.ini
|____index.php
```

Edit the my_ext.ini file and comment out the protobuf extension.

You can add extensions or comment on unnecessary extensions to optimize the startup speed of the PHP runtime. Sample code:

extension=session.so
extension=ftp.so
extension=shmop.so
extension=bcmath.so
extension=gettext.so
extension=pcntl.so
extension=simplexml.so
extension=xmlreader.so
extension=bz2.so
extension=gmp.so
extension=pdo.so
extension=soap.so
extension=xmlrpc.so
extension=calendar.so
extension=iconv.so
extension=pdo_mysql.so
extension=sockets.so
extension=xmlwriter.so
extension=ctype.so
extension=imagick.so
extension=phar.so
extension=sysvmsg.so
extension=dom.so
extension=json.so
extension=posix.so
extension=sysvsem.so
extension=exif.so
extension=zip.so
extension=memcached.so
extension=mbstring.so
;extension=protobuf.so
extension=sysvshm.so
extension=fileinfo.so
extension=mysqli.so
extension=redis.so
extension=tokenizer.so
extension=zip.so
extension=memcached.so
zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20170718/opcache.so
zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20170718/xdebug.so

Create a function based on the code package in the preceding directory. For more information, see Create a function.
Configure the environment variables for the function. PHP_INI_SCAN_DIR points to my_ext.ini under the code directory. The PHP runtime no longer loads the protobuf extension.