<?php
$str = "еще";
$valid_string_expr = '/^[а-я]+$/u';
var_dump(preg_match($valid_string_expr, $str));
$str = "ещё";
var_dump(preg_match($valid_string_expr, $str));
- Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- int(1)
int(0)
preferences:
217.74 ms | 403 KiB | 300 Q