xdebug drop support php7.0

Author: bestlong

php-fpm/Dockerfile

@@ -189,7 +189,11 @@ RUN if [ ${INSTALL_XDEBUG} = true ]; then \
   if [ $(php -r "echo PHP_MAJOR_VERSION;") = "5" ]; then \
     pecl install xdebug-2.5.5; \
   else \
-    pecl install xdebug; \
+    if [ $(php -r "echo PHP_MINOR_VERSION;") = "0" ]; then \
+      pecl install xdebug-2.9.0; \
+    else \
+      pecl install xdebug; \
+    fi \
   fi && \
   docker-php-ext-enable xdebug \
 ;fi