Add PHP version checkers on all php-related dockerfiles

workspace/Dockerfile-72

@@ -704,6 +704,12 @@ RUN if [ ${INSTALL_DUSK_DEPS} = true ]; then \
   && rm chromedriver_linux64.zip \
 ;fi
 
+#####################################
+# Check PHP version:
+#####################################
+
+RUN php -v | head -n 1 | grep -q "PHP 7.2."
+
 #
 #--------------------------------------------------------------------------
 # Final Touch