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<?php class a { static public function o() { return true;} } $cls = [ 'a::o' ]; foreach($cls as $cl) { echo var_export($cl, true); echo "\t"; 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); }
Output for git.master, git.master_jit, rfc.property-hooks
'a::o' is_callable bool(true) is_callable by syntax bool(true) instance of closure bool(false)

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