3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() { static $data = array( array('site_name' => 'bar'), array(), array('site_name' => 'baz') ); $current = current($data); next($data); return $current; } while ($bar = foo()) echo $bar['site_name']."\n"; echo '-------------------------------------------'."\n"; while (($bar = foo()) !== false) echo $bar['site_name']."\n";
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bar ------------------------------------------- baz

preferences:
199.78 ms | 404 KiB | 287 Q