Wordpress Update Version

Wordpress checks periodically to make sur开发者_如何转开发e that the version of Wordpress being used is the most up to date available... If it's not, the latest version number is displayed in the footer and in a notice below the header. Does anyone know the variable/constant/option I can use to get this number?

Thanks.

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$wp_version is the global variable for the currently running version. If you want to check for new versions, use this (only works in admin by default):

$cur = get_preferred_from_update_core();
if($cur !== false && isset($cur->current) && !empty($cur->current)){
  $new_version = $cur->current;
} else {
  $new_version = "You have the latest version of WordPress!";
}