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<?php $function = new ReflectionFunction(function( array &$a0 = null ){}); $parameters = $function->getParameters(); var_dump(strval($function));
Output for git.master, git.master_jit, rfc.property-hooks
string(140) "Closure [ <user> function {closure} ] { @@ /in/0jeYu 3 - 5 - Parameters [1] { Parameter #0 [ <optional> ?array &$a0 = NULL ] } } "

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