3v4l.org

run code in 300+ PHP versions simultaneously
<!DOCTYPE html> <html> <body> <?php // Positive numbers: echo substr("Hello world",10)."<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>"; ?> </body> </html>
Output for git.master, git.master_jit, rfc.property-hooks
<!DOCTYPE html> <html> <body> d<br>ello world<br>lo world<br>orld<br><br>d<br>ello world<br>lo world<br>orld<br> </body> </html>

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