How to get the PHP Version?

Question

Is there a way to check the version of PHP that executed a particular script from within that script? So for example, the following snippet

$version = way_to_get_version(); print $version; 

would print 5.3.0 on one machine, and 5.3.1 on another machine.

Answer 1

$version = phpversion(); print $version; 

Documentation

However, for best practice, I would use the constant PHP_VERSION. No function overhead, and cleaner IMO.

Also, be sure to use version_compare() if you are comparing PHP versions for compatibility.