3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo '2 + 2 = ' . (2 + 2 === 4 ? 4 : 2 + 2 === 5 ? 5 : 'dunno'); // should output "4", right? RIGHT?
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /in/pX0XQ on line 2
Process exited with code 255.
Output for 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Deprecated: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /in/pX0XQ on line 2 2 + 2 = 5
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 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 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.26
2 + 2 = 5
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/pX0XQ on line 2
Process exited with code 255.

preferences:
70.64 ms | 409 KiB | 5 Q