3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; echo ($$a + $a++); $a = 1; printf ("%s",($a + $a + $a + $a++));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined variable $1 in /in/LHRqe on line 5 14
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined variable $1 in /in/LHRqe on line 5 14
Output for 5.6.38, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: 1 in /in/LHRqe on line 5 14
Output for 7.3.32 - 7.3.33
14
preferences:
153.65 ms | 401 KiB | 212 Q