PHP anonymous functions chaining -

$app = 'app here';   $fn1 = function($var) use($app){     $fn2($var); };  $fn2 = function($var) use($app){     echo $var; };  $fn1('variable'); 

in above example, trying chain/forward multiple anonymous functions. however, @ below line receive error "notice: undefined variable: fn2"

$fn2($var) 

how achieve chaining of anonymous functions.

the problem not passing $fn2 parameter in use statement of closure.

try following code:

    $app = 'app here';      $fn2 = function($var) use($app){        echo $var;     };      $fn1 =  function($var) use($app, $fn2){        $fn2($var);     };      $fn1('variable'); 

here have example working in online php tester.