3v4l.org

run code in 500+ PHP versions simultaneously
<?php $cid = 'active-trail:route:menu_test.exotic_path:route_parameters:a:1:{s:6:"exotic";s:51:" -._~!$\'"()*@[]?&+%#,;=:#%&+/?éøïвβ中國書۞";}'; var_dump(mb_check_encoding($cid, 'ASCII'));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
bool(false)

preferences:
29.29 ms | 1137 KiB | 7 Q