CODEWITHSUNDEEP
phpfunction
Emanuil Rusev
Emanuil Rusev

Reputation: 35265

Passing a parameter from a parent to a child function

I'm trying to pass a parameter from a parent function to a child function while keeping the child function parameterless. I tried the following but it doesn't seem to work.

public static function parent($param)
{
    function child()
    {
        global $param;

        print($param) // prints nothing
    }
}

Upvotes: 1

Views: 1549

Answers (3)

Yann Chabot
Yann Chabot

Reputation: 4869

The right way to do this there would be to create an anonymous function inside your parent function, and then use the ''use'' keyword.

public static function parent($params) {
  function() use ($params) {
    print($params);
  }
}

https://www.php.net/manual/en/functions.anonymous.php

Upvotes: 1

Tomasz Kowalczyk
Tomasz Kowalczyk

Reputation: 10467

I think that the global you call in child() does not refer to that scope. Try running it with really global variable.

Upvotes: 1

halfdan
halfdan

Reputation: 34234

You can use lambda functions from PHP 5.3 and on:

public static function parent($param) {
  $child = function($param) {
    print($param);
  }

  $child($param);
}

If you need to do it with earlier versions of PHP try create_function.

Upvotes: 3

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