Online PHP editor | output for QRU0R

@ 2014-08-15T13:49:12Z

<?php

$a = true;
$b = &$a;

var_dump(is_ref($a, $b));

function is_ref(&$a, &$b)
{
	if ($a !== $b) 
		return false;

	// create a unique different value
	$differentValue = ($a === true) ? false : true;

	// We need a copy of $a, to keep safe. Note that if $a is a "referenced" value, $copy will be too.
    $copy = $a;           

	// Change $a and check if $b changed too, finally restore $a using $copy.
    $a = $differentValue; 
    $same = $a === $b;    
	$a = $copy;           
	
	return $same;
}

Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: bool(true)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(true)

preferences:dark modelive preview