library/core/class.pluginmanager.php
public function IsEnabled($Name) {
      $Enabled = $this->EnabledPlugins;
      return isset($Enabled[$Name]) && $Enabled[$Name];
   }
public function IsEnabled($Name) {
      $Enabled = $this->EnabledPlugins;
      return isset($Enabled[$Name]) && $Enabled[$Name];
   }
public function IsEnabled ( $ Name ) { $ Enabled = $ this -> EnabledPlugins ; return isset ( $ Enabled [ $ Name ] ) && $ Enabled [ $ Name ] ; }
Returns whether or not a plugin is enabled.

@param string $Name The name of the plugin.
@return bool Whether or not the plugin is enabled.
@since 2.2
Returns whether or not a plugin is enabled .