3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo(sprintf("('1%1$\')", 'a')); echo(sprintf("('1%\')", 'a','b')); echo(sprintf("('1%')", 'a','b')); echo(sprintf("('1%)a", 'a','b'));
based on UHpYE
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
('1')('1')('1('1a