PHP anonymous function and use clause usage instance _php skill

This example describes the PHP anonymous function and use clause usage. Share to everyone for your reference, specific as follows:

The following method outputs the Hello World

$param 1 and $param2 are closed-pack variables

function test ()
{
  $param 2 = ' every ';
  Returns an anonymous function return function
  ($param 1) using ($param 2) {
    //USE clause let anonymous function take its scope variable
    $param 2. = ' one ';
    Print $param 1. ' ' . $param 2;}
  ;
}
$anonymous _func = Test ();
$anonymous _func (' hello ');

The following way output Hello everyone

function test ()
{
  $param 2 = ' everyone ';
  $func = function ($param 1) use ($param 2) {
    //using clause lets the anonymous function print $param 1 of the variable of its parent scope
    . ' ' . $param 2;
  };
  $param 2 = ' everybody ';
  return $func;
}
$anonymous _func = Test ();
$anonymous _func (' hello ');

The following way output Hello everybody

One more reference in $param 2

function test ()
{
  $param 2 = ' everyone ';
  $func = function ($param 1) Use (& $param 2)
    the {//Use clause lets the anonymous function print $param 1 of the variable of its parent scope
    . ' ' . $param 2;
  };
  $param 2 = ' everybody ';
  return $func;
}
$anonymous _func = Test ();
$anonymous _func (' hello ');

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