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<?php
function f1()
{
	$first = 10;
	function f2()
	{
		$second = $first + 10;
		return $second;
	}
	$t = f2();
	return $t;
}
var_dump(f1());

Success #stdin #stdout #stderr 0.02s 24448KB

stdin

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Standard input is empty

stdout

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int(10)

stderr

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PHP Notice:  Undefined variable: first in /home/la7rq7/prog.php on line 7

https://ideone.com/LecT2V

language:

PHP (php 7.3.5)

created:

visibility:

public

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