3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = (object) array('' => 'empty', '1' => 'one'); foreach ($foo as $k=>$v) { echo "'$k' -> '$v'\n"; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
'' -> 'empty' '1' -> 'one'
Output for 5.6.21 - 5.6.28, 7.0.6 - 7.0.20
'1' -> 'one'
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.20, 7.0.0 - 7.0.5
Notice: Illegal member variable name in /in/fHLvA on line 4 '1' -> 'one'
Output for 5.2.0
Notice: Illegal member variable name in /in/fHLvA on line 4 Notice: Illegal member variable name in /in/fHLvA on line 4
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
preferences:
216.4 ms | 402 KiB | 330 Q