3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Positive numbers: echo substr("ela4-db10.prod",5)."<br>"; echo substr("Hello world",1)."<br>"; echo substr("Hello world",3)."<br>"; echo substr("Hello world",7)."<br>"; echo "<br>"; // Negative numbers: echo substr("Hello world",-1)."<br>"; echo substr("Hello world",-10)."<br>"; echo substr("Hello world",-8)."<br>"; echo substr("Hello world",-4)."<br>"; ?>

preferences:
28.98 ms | 402 KiB | 5 Q