Create an example with Docker to show websupport-sk/pecl-memcache#23

README.md

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+# pecl-memcache Issue #23
+
+This repository reproduces the issue described in
+[websupport-sk/pecl-memcache#23][pecl-memcache-23].
+
+In short, on PHP 7.1, when using `memcache` as the `session.save_handler`, the
+following warning occurs when calling `session_start()`:
+
+```
+Warning: session_start(): Failed to read session data: memcache (path: tcp://127.0.0.1:11211)
+```
+
+The same code and settings does not result in this warning on PHP 7.0.
+
+
+## Running the Example
+
+This example uses [Docker][] and [Docker Compose][] to build two images and run
+two containers (one for PHP 7.0 and one for PHP 7.1). Both are identical, expect
+for the version of PHP used.
+
+``` bash
+git clone /~https://github.com/ramsey/pecl-memcache-issue-23
+cd pecl-memcache-issue-23/
+docker-compose up
+```
+
+Now, the two containers should be running, you can open the following in your
+browser to verify:
+
+* <http://localhost:8001/info.php> (should be running PHP 7.0)
+* <http://localhost:8002/info.php> (should be running PHP 7.1)
+
+To test the `session_start()` issue and see the warning, open the following:
+
+* PHP 7.0: <http://localhost:8001/> (the session should work as expected)
+* PHP 7.1: <http://localhost:8002/> (`session_start()` should generate a warning)
+
+
+[pecl-memcache-23]: /~https://github.com/websupport-sk/pecl-memcache/issues/23
+[docker]: https://docs.docker.com/
+[docker compose]: https://docs.docker.com/compose/overview/

docker-compose.yml

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+version: '3'
+services:
+  php70:
+    build:
+      context: ./docker
+      dockerfile: Dockerfile
+      args:
+        php_version: "7.0"
+    image: pecl-memcache-issue-23:php70
+    ports:
+      - "8001:8000"
+    volumes:
+      - .:/code
+  php71:
+    build:
+      context: ./docker
+      dockerfile: Dockerfile
+      args:
+        php_version: "7.1"
+    image: pecl-memcache-issue-23:php71
+    ports:
+      - "8002:8000"
+    volumes:
+      - .:/code

docker/Dockerfile

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+ARG php_version=latest
+FROM php:${php_version}
+
+COPY docker-setup.sh docker-entrypoint /usr/local/bin/
+COPY memcache.ini /usr/local/etc/php/conf.d/
+
+RUN /usr/local/bin/docker-setup.sh \
+    && rm /usr/local/bin/docker-setup.sh
+
+WORKDIR /code
+EXPOSE 8000
+
+ENTRYPOINT ["docker-entrypoint"]

docker/docker-entrypoint

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+#!/bin/sh
+set -e
+/usr/bin/memcached -m 50 -p 11211 -u memcached -l 127.0.0.1 -d
+php -S 0.0.0.0:8000 -t /code/

docker/docker-setup.sh

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+#!/bin/sh
+
+apt-get -y update
+apt-get -y install memcached zlib1g-dev
+
+groupadd -r memcached && useradd -r -g memcached memcached
+
+mkdir -p /code/pecl-memcache
+cd /code
+
+curl -L -o pecl-memcache.tar.gz /~https://github.com/websupport-sk/pecl-memcache/archive/NON_BLOCKING_IO_php7.tar.gz
+tar --strip-components=1 -C /code/pecl-memcache/ -zxf pecl-memcache.tar.gz
+
+cd /code/pecl-memcache
+phpize
+./configure
+make
+make install
+
+cd /code
+rm -rf /code/pecl-memcache/ pecl-memcache.tar.gz

docker/memcache.ini

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+extension = memcache.so
+session.save_handler = memcache
+session.save_path = "tcp://127.0.0.1:11211"

index.php

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+<?php
+session_start();
+
+$_SESSION['foo'] = 'bar';
+
+?>
+
+<h1>Hello!</h1>
+
+<p>I just stored some data to the session.</p>
+
+<p><a href="next.php">Go to the next page to read data from the session.</a></p>
+
+<ul>
+    <li><code>PHP version: <?php echo phpversion(); ?></code></li>
+    <li><code>pecl/memcache version: <?php echo phpversion('memcache'); ?></code></li>
+    <li><code>session.save_handler = <?php echo ini_get('session.save_handler'); ?></code></li>
+    <li><code>session.save_path = <?php echo ini_get('session.save_path'); ?></code></li>
+</ul>

info.php

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+<?php
+phpinfo();

next.php

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+<?php
+session_start();
+
+header('Content-Type: text/plain');
+
+echo '$_SESSION = ' . "\n\n";
+
+var_export($_SESSION);