PHP Extension

A PHP-Extension just for fun, maybe something evolves here? Who knows...

Building

To debug this extension (on linux) install the build tools, gdb, valgrind and what other stuff you need:

package-manager install build-essential autoconf automake bison flex re2c gdb libtool make pkgconf valgrind git

Then clone the interpreter source and switch branches:

• git clone https://github.com/php/php-src.git
• cd php-src
• git checkout PHP-8.2

Then build php:

• mkdir php-build
• ./buildconf --force
• ./configure --enable-debug --prefix=/your-php-src-dir/php-build/DEBUG --with-config-file-path=/your-php-src-dir/php-build/DEBUG/etc (for more options see ./configure --help, for example nts/zts build or directly include extensions in binary)
• export CORE_COUNT=nproc``
• make -j$CORE_COUNT
• make install
• cd ..
• mkdir /your-php-src-dir/php-build/DEBUG/etc and put the php.ini file into it
• Add the new php executable to your path (/your-php-src-dir/php-build/DEBUG/bin)
• Check that stuff works by running php -v
• Now create an extension skeleton with: php ./ext/ext_skel.php --ext name-of-extension --dir path-where-the-ext-should-get-created
• Follow the output steps to build the extension into a shared library
• Add extension=name-of-extension.so as a new line in the php.ini file
• With php -m the new extension should show up and you should be able to call the registered function by running php -r test_test1();
• Get started on developing extensions. Some links with cool information:
  • https://www.zend.com/sites/default/files/pdfs/whitepaper-zend-php-extensions.pdf
  • https://kchodorow.com/2011/08/11/php-extensions-made-eldrich-installing-php/
  • https://youtu.be/WMOI2U8McTE
  • https://www.phpinternalsbook.com/
  • https://externals.io/
  • https://www.npopov.com/
  • https://www.zend.com/blog/debugging-php-segmentation-faults

Debugging

Attach with gdb and use the gdbinit script from php-src. Steps follow...