Online PHP editor | output for vWVSW

<?php $null = null; echo 'var_export(): ' . var_export($null, true); echo "\n"; echo 'var_dump(): ' . (function($v){ ob_start(); var_dump($v); return ob_get_clean(); })($null); //echo "\n"; echo 'print_r(): ' . print_r($null, true); echo "\n"; echo 'json_encode(): ' . json_encode($null); echo "\n"; echo 'serialize(): ' . serialize($null); echo "\n"; echo 'strval(): ' . strval($null); echo "\n"; echo 'gettype(): ' . gettype($null); echo "\n"; echo 'null coalesce: ' . ($null ?? 'null'); echo "\n"; echo 'ternary: ' . ($null === null ? 'null' : $null); echo "\n"; echo 'condition: ' . (function($v) { if ($v === null) { return 'null'; }})($null);