3v4l.org

run code in 300+ PHP versions simultaneously
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Output for 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, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.18, 8.4.1 - 8.4.5
<p> testing 5 squared = 25</p> <p> testing 10 squared = 100</p> <p> testing 15 squared = 225</p> <p> testing 20 squared = 400</p> <p><a href="squared.html"> return </a></p>
preferences:
161.88 ms | 413 KiB | 5 Q