3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $id = 1; echo 'Single quotes: $id'."\n"; echo "Doubles quotes: $id"."\n"; echo 'Single quotes with concatenation: ' . $id;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Single quotes: $id Doubles quotes: 1 Single quotes with concatenation: 1