3v4l.org

run code in 300+ PHP versions simultaneously
<?php $hola = null; var_dump( $hola??'no definido' ); echo "\n"; $hola = false; var_dump( $hola??'no definido' ); echo "\n"; var_dump( $_GET['parametro']??'no definido' );
Output for 7.0.0 - 7.0.32, 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
string(11) "no definido" bool(false) string(11) "no definido"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Parse error: syntax error, unexpected '?' in /in/N9dQ7 on line 4
Process exited with code 255.

preferences:
232.28 ms | 401 KiB | 289 Q