install apcu instead of apc for PHP >= 5.5

.travis.yml

@@ -58,12 +58,14 @@ before_script:
   - sh -c "if [ '$DB' = 'pgsql' ]; then psql -c 'CREATE DATABASE cakephp_test;' -U postgres; fi"
   - sh -c "if [ '$DB' = 'pgsql' ]; then psql -c 'CREATE SCHEMA test2;' -U postgres -d cakephp_test; fi"
   - sh -c "if [ '$DB' = 'pgsql' ]; then psql -c 'CREATE SCHEMA test3;' -U postgres -d cakephp_test; fi"
-
-  - sh -c "if [ '$HHVM' != '1' ]; then echo 'extension = memcached.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi"
-  - sh -c "if [ '$HHVM' != '1' ]; then echo 'extension = redis.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi"
-  - sh -c "if [ '$HHVM' != '1' ]; then echo 'extension = apc.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi"
-  - sh -c "if [ '$PHP' = '5.6' ]; then pecl install apc; fi"
-  - sh -c "if [ '$HHVM' = '1' ]; then composer require lorenzo/multiple-iterator=~1.0; fi"
+  
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' ]] ; then pecl channel-update pecl.php.net; fi;
+
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' ]] ; then echo 'extension = memcached.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' ]] ; then echo 'extension = redis.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' ]] ; then echo 'extension = apcu.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' ]] ; then echo yes | pecl install apcu; fi
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' ]] ; then composer require lorenzo/multiple-iterator=~1.0; fi
 
   - phpenv rehash
   - set +H