Online PHP editor | refs for CbrFm

<?php class a { static public function o() { return true;} } $cls = [ a::o(), 'a::o','strpos::test' , 'strlen', function(){}, null]; foreach($cls as $cl) { echo "is_callable\n"; var_dump(is_callable($cl)); echo "is_callable by syntax\n"; var_dump(is_callable($cl,true)); echo "instance of closure\n"; var_dump($cl instanceof Closure); }