PHP 5.3 apparently does not warn on array to string conversion

Signed-off-by: emanuele <emanuele45@gmail.com>
Discussing with Spuds test a conversion of an integer to string makes more sense

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #1140 from emanuele45/fix_php53_test

PHP 5.3 apparently does not warn on array to string conversion