Sometimes you just want to disable the functionality of a build-in PHP function without touching code or using the disable_functions option which spits out a fatal error.
This extension is a proof of concept that allows you to replace any built-in function in PHP with a NOP (no operation) function.
The NOP replacement function does not return any value so it is not guaranteed to be a drop-in replacement for all functions.
You can install this extension via the deb packages in the releases section. For example, to install the extension for PHP 8.3 on an ARM64 machine, run the following:
curl -sLo ./php8.3-nop_arm64_0.1.0.deb https://github.com/null93/php-nop/releases/download/0.1.0/php8.3-nop_arm64_0.1.0.deb
apt install ./php8.3-nop_arm64_0.1.0.debNext, you will want to enable the extension in your PHP configuration file.
extension=nop.so
nop.functions=chmod,chownNotice that nop.functions is a comma-separated list of functions that you want to replace with the NOP function.
Spin up a Docker container:
docker run -v `pwd`:/usr/src -w /usr/src --rm -it php:8.3-cli-alpine shInside the container, run the following commands:
# Install build dependencies and build the extension
apk --update add php83-dev make g++
phpize && ./configure && make && make install
make test
# Manually test functionality
php -d 'extension=nop.so' -d 'nop.functions=' -r 'printf ("hi\n");'
php -d 'extension=nop.so' -d 'nop.functions=printf' -r 'printf ("hi\n");'Automatically packaged with NFPM and Github actions. Simply tag and push. If you need to manually package, run the following:
export VERSION=0.1.0
export PHP_VERSION=8.3
export ARCH=amd64
./scripts/nfpm-template > nfpm.yaml
nfpm pkg --packager deb --target php8.3_nop_amd64.deb