API	Package	Class	phpDocumentor	Last reviewed	Doc status
Joomla.Framework	Joomla.Framework	JVersion	JVersion::isCompatible	never	Work in progress

Compares a “PHP standardized” version number against the current Joomla! version. This is useful if you would like to write extensions working only on some specific version of Joomla!

This method can be called statically.

boolean isCompatible( string $minimum )

Find if the present Joomla! installation matches version “1.5.0”. Provided the constant JVERSION has a value of “1.5.0”.

$version_required = '1.5.0';
if ( JVersion::isCompatible($version_required) !== true ) {
  echo "Please install Joomla! ". $version_required ." to use this code.";
} else {
  echo "Version requirements are set.";
}

might produce on success:

Please install to Joomla! 1.5.0 to use this code.

The method is using PHP‘s Equal operator “eq” to compare the provided $minimum with JVERSION. If your code requires a specific version of Joomla! to be available, i.e. “1.5.0”, this method will perform as expected. If your code will perform as well with a (hypothetical) release “1.5.1” or “1.6.5”, the method will return false however. Use the native version_compare() function if you need a more sophisticated version comparision.