Extension not loaded

[danieljosephbrennan]

I am getting this error: "Use of undefined constant XML_PI_NODE - assumed 'XML_PI_NODE' (this will throw an Error in a future version of PHP)"
This seems to indicate that the xml extension is not loaded, but I have added it to php.ini

[JDJunge]

I ran into a surprisingly similar issue just yesterday.
My mysql extension was not loaded.

I guess the php.ini file is in the wrong directory. In the resulting lambda-layer it will be found under /opt/php.ini but the bootstrap will search for it somewhere else.

I changed
exec("PHP_INI_SCAN_DIR=/opt/etc/php-7.${phpMinorVersion}.d/:/var/task/php-7.${phpMinorVersion}.d/ php -S localhost:8000 -c /var/task/php.ini -d extension_dir=/opt/lib/php/7.${phpMinorVersion}/modules '$handler_filename'");

To
exec("PHP_INI_SCAN_DIR=/opt/ php -S localhost:8000 -c /opt/php.ini -d extension_dir=/opt/lib/php/7.${phpMinorVersion}/modules '$handler_filename'");

Now extensions are beeing loaded (confimed via phpinfo())

[silvian-io]

Hi there. So i bumped into the same issue also, trying to install a PHP layer on my dumb AWS lambda function(I needed the json and mbstring modules). In my case, the above solution didn't work, as I was getting a permission denied error:

RequestId: xxxxxxxxx Error: Runtime failed to start: fork/exec /opt/bootstrap: permission denied
Runtime.ExitError

The solution was to update the exec line to:

exec("PHP_INI_SCAN_DIR=/opt/etc/php-7.${phpMinorVersion}.d/:/var/task/php-7.${phpMinorVersion}.d/ php -S localhost:8000 -c /var/task/php.ini -d extension_dir=/opt/lib/php/7.${phpMinorVersion}/modules '$handler_filename'");

and add the php.ini file, that includes all the modules I need, at the top level of my lambda function folder, next to all the other files. As the lambda env runs at /var/task , setting the path at /var/task/php.ini worked for me.

Extensions are loaded now.

Hope this helps. All the best

[zilahir]

The extensions are not loaded for me either, and don't know how to approach this problem.

I am getting the following error in the logs.

[Mon Sep 9 16:11:29 2019] PHP Warning: PHP Startup: Unable to load dynamic library 'xml.so' (tried: /opt/lib/php/7.3/modules/xml.so (/opt/lib/php/7.3/modules/xml.so: cannot open shared object file: No such file or directory), /opt/lib/php/7.3/modules/xml.so.so (/opt/lib/php/7.3/modules/xml.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0

According to the docs, the modules should be there, but apparently they are not.

Any ideas, suggestions? Thanks in advance!