3v4l.org

run code in 500+ PHP versions simultaneously
<?php echo ((new \DateTime("first mon of June 2020"))->format('Y-m-d')) . PHP_EOL; echo ((new \DateTime("Monday June 2020"))->format('Y-m-d')) . PHP_EOL;
Output for 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 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
2020-06-01 2020-06-01
preferences:
89.29 ms | 1557 KiB | 4 Q