3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str_utf8 = 'qqРусскийqqтекст12'; $login = $str_utf8;//iconv('UTF-8', 'Windows-1251', $str_utf8); $password = $str_utf8; //iconv('UTF-8', 'Windows-1251', $str_utf8); if ((preg_match('#.#u', $login)) or (preg_match('#.#u', $password))){ $login = iconv('UTF-8', 'CP1251', $login); $password = iconv('UTF-8', 'CP1251', $password); echo('utf-8 \n');} var_dump($login); var_dump($password); ?>

preferences:
46.3 ms | 402 KiB | 5 Q