3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo (strtoupper("hi my name is kelsey")); echo "<br />"; echo (strtolower("HI MY NAME IS KELSEY")); echo "<br />"; echo (ucfirst("hi my name is kelsey")); echo "<br />"; echo (ucwords("hi my name is kelsey")); echo "<br />"; ?>
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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
HI MY NAME IS KELSEY<br />hi my name is kelsey<br />Hi my name is kelsey<br />Hi My Name Is Kelsey<br />

preferences:
218.68 ms | 405 KiB | 323 Q