Add Core extensions

php_modules/zlib/README.md

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+# zlib
+
+This module enables you to transparently read and write gzip (.gz) compressed files, through versions of most of the filesystem functions which work with gzip-compressed files (and uncompressed files, too, but not with sockets).
+
+| Platform | Url                                                              |
+|----------|------------------------------------------------------------------|
+| PHP.net  | https://www.php.net/manual/en/book.zlib.php                      |

php_modules/zlib/build.yml

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+---
+
+# Available Jinja2 variables:
+# ---------------------------
+# * {{ php_all_versions }}:  Array of all PHP versions
+
+
+already_avail: "{{ php_all_versions }}"

php_modules/zlib/options.yml

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+---
+
+# The name of the module
+name: zlib
+
+# Exclude module build/installation for the following PHP versions
+exclude: []
+
+# In order for this module to built correctly against all dependencies,
+# the following modules must have been built first.
+depends_build: []
+
+# In order for this module to function correctly,
+# the following modules must be loaded before.
+depends_load: []
+
+# If the following PHP modules are loaded, this module will not behave as expected.
+conflicts_load: []
+
+# Enable this module by default via php.ini for PHP cli command?
+enabled_php_cli: true
+
+# Enable this module by default via php.ini for PHP-FPM?
+enabled_php_fpm: true

php_modules/zlib/test.yml

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+---