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run code in 150+ php & hhvm versions
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<?php $template = "<html><head><title>{{head}}</title></head><body>{{body}}</body></html>"; $vars = preg_match("{{(\w*)}}", $template); print_r($vars);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1