3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = NULL; $c = false; print $a ?? '1b'; print "\n"; print $a ?: '2b'; print "\n"; print $c ?? '1d'; print "\n"; print $c ?: '2d'; print "\n"; print $e ?? '1f'; print "\n"; print $e ?: '2f';
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
1b 2b 2d 1f Warning: Undefined variable $e in /in/fnG9W on line 21 2f
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
1b 2b 2d 1f Notice: Undefined variable: e in /in/fnG9W on line 21 2f
Output for 7.3.32 - 7.3.33
1b 2b 2d 1f 2f
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/fnG9W on line 6
Process exited with code 255.

preferences:
173.84 ms | 411 KiB | 5 Q