3v4l.org

run code in 500+ PHP versions simultaneously
<?php echo cal_days_in_month(CAL_FRENCH, 13, 14);
Output for 5.6.28, 7.0.14 - 7.0.33, 7.1.0 - 7.1.7
5
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 - 5.6.21, 7.0.0 - 7.0.6
-2380948
Output for 7.1.20 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Fatal error: Uncaught Error: Call to undefined function cal_days_in_month() in /in/2vhM7:3 Stack trace: #0 {main} thrown in /in/2vhM7 on line 3
Process exited with code 255.

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