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<?php $template = "<html><head><title>{{head}}</title></head><body>{{body}}</body></html>"; $vars = preg_match_all("{{(\w*)}}", $template, $matches); var_dump($matches[1]);
Output for 4.3.0 - 7.1.0
array(2) { [0]=> string(4) "head" [1]=> string(4) "body" }