Use lineinfile only, if regex lines are matching anything

tasks/php.yml

@@ -178,6 +178,7 @@
         dest: /etc/apache2/sites-available/{{ apache_conf_default_prefix }}default{{ apache_conf_ext }}
         regexp: '{{ item.regexp }}'
         line: '{{ item.line }}'
+        backrefs: yes
       with_items:
         - regexp: 'ProxyPassMatch'
           line: '  ProxyPassMatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:{{ php_fpm_port|default(9999) }}/var/www{{apache_server_default_root}}/$1'