3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array ( 0 => '%unaware%', 1 => '', 2 => '%', 3 => '', 4 => '', 5 => 'unaware', 6 => '', ); list(, , $tag, $atts, $cite, $content, $end) = $a; var_dump($tag);
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 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
string(1) "%"
preferences:
133.88 ms | 410 KiB | 5 Q