3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 5; $mess = "\xa9Gia tri cua a la: $a"; echo htmlentities($mess);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
�Gia tri cua a la: 5
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
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
&copy;Gia tri cua a la: 5
preferences:
235.57 ms | 403 KiB | 355 Q