Merging the three Dockerfiles into one

Will now depend on the PHP_VERSION build arg

Dockerfile-56 → Dockerfile

@@ -17,7 +17,9 @@ ENV LC_CTYPE=en_US.UTF-8
 ENV LANG=en_US.UTF-8
 ENV TERM xterm
 
-# Add the "PHP 5" ppa
+ARG PHP_VERSION=${PHP_VERSION:-70}
+
+# Add the PHP ppa
 RUN apt-get install -y software-properties-common && \
     add-apt-repository -y ppa:ondrej/php
 
@@ -29,6 +31,23 @@ RUN apt-get install -y software-properties-common && \
 
 # Install "PHP Extentions", "libraries", "Software's"
 RUN apt-get update && \
+    apt-get install -y --allow-downgrades --allow-remove-essential \
+        --allow-change-held-packages \
+        pkg-config \
+        libcurl4-openssl-dev \
+        libedit-dev \
+        libssl-dev \
+        libxml2-dev \
+        xz-utils \
+        libsqlite3-dev \
+        sqlite3 \
+        git \
+        curl \
+        vim \
+        nano \
+        postgresql-client
+
+RUN if [ ${PHP_VERSION} = 56 ]; then \
     apt-get install -y --allow-downgrades --allow-remove-essential \
         --allow-change-held-packages \
         php5.6-cli \
@@ -47,20 +66,46 @@ RUN apt-get update && \
         php5.6-memcached \
         php5.6-gd \
         php5.6-dev \
-        pkg-config \
-        libcurl4-openssl-dev \
-        libedit-dev \
-        libssl-dev \
-        libxml2-dev \
-        xz-utils \
-        libsqlite3-dev \
-        sqlite3 \
-        git \
-        curl \
-        vim \
-        nano \
-        postgresql-client \
-    && apt-get clean
+;elif [ ${PHP_VERSION} = 70 ]; then \
+    apt-get install -y --allow-downgrades --allow-remove-essential \
+        --allow-change-held-packages \
+        php7.0-cli \
+        php7.0-common \
+        php7.0-curl \
+        php7.0-json \
+        php7.0-xml \
+        php7.0-mbstring \
+        php7.0-mcrypt \
+        php7.0-mysql \
+        php7.0-pgsql \
+        php7.0-sqlite \
+        php7.0-sqlite3 \
+        php7.0-zip \
+        php7.0-bcmath \
+        php7.0-memcached \
+        php7.0-gd \
+        php7.0-dev \
+;elif [ ${PHP_VERSION} = 71 ]; then \
+    apt-get install -y --allow-downgrades --allow-remove-essential \
+        --allow-change-held-packages \
+        php7.1-cli \
+        php7.1-common \
+        php7.1-curl \
+        php7.1-json \
+        php7.1-xml \
+        php7.1-mbstring \
+        php7.1-mcrypt \
+        php7.1-mysql \
+        php7.1-pgsql \
+        php7.1-sqlite \
+        php7.1-sqlite3 \
+        php7.1-zip \
+        php7.1-memcached \
+        php7.1-gd \
+        php7.1-dev \
+;fi
+
+RUN apt-get clean
 
 #####################################
 # Composer: