3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = null; $b = 'test'; $c = null; $test1 = function() use (&$a, &$b, &$c) { $value = 1; $a = &$value; $b = &$value; $c = array( 'c' => &$value, ); }; $test1(); echo 'a: '; var_dump($a); echo 'b: '; var_dump($b); echo 'c: '; var_dump($c); exit;
Output for 7.3.13 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
a: NULL b: string(4) "test" c: array(1) { ["c"]=> int(1) }
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 a: NULL b: string(4) "test" c: array(1) { ["c"]=> int(1) }

preferences:
177.99 ms | 402 KiB | 145 Q