note 126998 added to function.is-null

A quick test in 2022 on PHP 8.1 confirms there is still no need to micro-optimize NULL checks: <?php // Comparison Operator $before = microtime(true); $var = null; for ($i=0 ; $i<1000000000 ; $i++) { if($var === null) {} } $after = microtime(true); echo ' ===: ' . ($after - $before) . " seconds\n"; // Function $before = microtime(true); $var = null; for ($i=0 ; $i<1000000000 ; $i++) { if(is_null($var)) {} } $after = microtime(true); echo 'is_null: ' . ($after - $before) . " seconds\n"; // ===: 4.1487579345703 seconds // is_null: 4.1316878795624 seconds ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.135 (proxied: 67.253.148.123) ---- Manual Page -- https://php.net/manual/en/function.is-null.php Edit -- https://main.php.net/note/edit/126998 Del: integrated -- https://main.php.net/note/delete/126998/integrated Del: useless -- https://main.php.net/note/delete/126998/useless Del: bad code -- https://main.php.net/note/delete/126998/bad+code Del: spam -- https://main.php.net/note/delete/126998/spam Del: non-english -- https://main.php.net/note/delete/126998/non-english Del: in docs -- https://main.php.net/note/delete/126998/in+docs Del: other reasons-- https://main.php.net/note/delete/126998 Reject -- https://main.php.net/note/reject/126998 Search -- https://main.php.net/manage/user-notes.php