3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = "¿Holá?"; print strlen($x); print "\n"; print $x[0]; print "\n"; print substr($x, 1); print "\n"; print htmlentities($x); print "\n";
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
8 � �Holá? &iquest;Hol&aacute;?
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
8 � �Holá? &Acirc;&iquest;Hol&Atilde;&iexcl;?
preferences:
230.04 ms | 402 KiB | 314 Q