Test for php ~7.4

.travis.yml

@@ -6,6 +6,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
 
 before_install:
   - nvm install 8

docker/php/Dockerfile-74

@@ -0,0 +1,23 @@
+FROM php:7.4-alpine
+
+MAINTAINER Peter Lai <alk03073135@gmail.com>
+
+COPY composer-setup.php composer-setup.php
+# COPY php.ini-production $PHP_INI_DIR/php.ini
+
+RUN apk update && \
+    apk add git
+
+# Install gmp
+Run apk add gmp-dev && \
+    docker-php-ext-install gmp
+
+# Install nodejs
+# Run apk add --update nodejs nodejs-npm
+
+# Install composer
+RUN php composer-setup.php && \
+    php composer-setup.php --install-dir=/usr/bin --filename=composer && \
+    php -r "unlink('composer-setup.php');"
+
+WORKDIR /app