<?php
$text = "rhhRj 12 4.57 tThr";
$regexp = "/^\s+[0-9]+/";
echo "Число есть в тексте: {$matches[0]}\n";
} else {
echo "Числа не обнаружено";
}
PD9waHAKIAplcnJvcl9yZXBvcnRpbmcgKC0xKTsKCiR0ZXh0ID0gInJoaFJqIDEyIDQuNTcgdFRociI7CiRyZWdleHAgPSAiL15ccytbMC05XSsvIjsKCiRtYXRjaGVzID0gYXJyYXkoKTsKIAppZiAocHJlZ19tYXRjaCgkcmVnZXhwLCAkdGV4dCwgJG1hdGNoZXMpKSB7CgllY2hvICLQp9C40YHQu9C+INC10YHRgtGMINCyINGC0LXQutGB0YLQtTogeyRtYXRjaGVzWzBdfVxuIjsKfSBlbHNlIHsKCWVjaG8gItCn0LjRgdC70LAg0L3QtSDQvtCx0L3QsNGA0YPQttC10L3QviI7Cn0=