- Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.12 - 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
- int(1) int(1)
- Output for 7.4.0 - 7.4.11
- int(0) int(1)
<?php
$pattern1 = '/^[0-9_\p{L}\p{Cyrillic}]+$/u';
var_dump(preg_match($pattern1, 's'));
var_dump(preg_match($pattern1, 'S'));
# https://regex101.com/r/F5JvPD/1