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@ 2014-08-15T12:17:59Z

<?php

preg_match('(\d+)', 'Осталось всего 2', $roomsLeftMatches);
$left = isset($roomsLeftMatches[1]) ? $roomsLeftMatches[1] : null;
var_dump($left);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match: documentation ( source)

preferences:dark modelive preview

42.69 ms | 402 KiB | 5 Q