tried to get the extension to work..

jaytaph-php7-extension/Dockerfile

@@ -0,0 +1,22 @@
+FROM php:7-alpine
+MAINTAINER robin@kingsquare.nl
+
+# Create working dir
+RUN mkdir -p /var/app
+COPY . /var/app
+WORKDIR /var/app
+
+RUN \
+    apk add --no-cache autoconf g++ make &&\
+    # build it and they will com.. pile
+    phpize && \
+    ./configure && \
+    # compile it and they will raffle
+    make && \
+    make install && \
+    echo "extension=domcode.so" >> /usr/local/etc/php/conf.d/domcode.ini && \
+    # radio gaga...
+    apk del autoconf g++ make
+
+CMD ["php", "test.php", "/var/names/current"]
+

jaytaph-php7-extension/test.php

@@ -1,8 +1,12 @@
 <?php
 
-$d = new DomCode();
-$d->addname('foo');
-$d->addname('bar');
-$d->addname('baz');
+$filename = !empty($argv[1]) && is_readable($argv[1]) ? realpath($argv[1]) : '';
+if (empty($filename)) {
+    die('please use `php test.php path_to_file`');
+}
 
-echo $d->raffle();
+$d = new DomCode();
+foreach (array_filter(file($filename)) as $name) {
+    $d->addname($name);
+}
+echo $d->raffle().PHP_EOL;