RH7/COS7 apparently only support PHP 5.4.16 through their respective repos.
CWP for unbeknownst reason installed components of PHP 5.4.16 (e.g. common, cli) during the initial setup and never removed them later on, not even their PHP selector scripts. 2 PHP version, even just components, seem to to stir trouble..
As of now removing php and php-* seems to remedy the situation, removing PHP and components of current (5.4.16) flavour as supplied by the RH/COS repos