<?php

$text = '89115065656';
$text2 = '8(911)-506 56 56';
$text3 = '8-911-50-656-56';
$text4 = '89115065656 позвать Люду';
$regexp = '/^[0-9](\\(?)(\\-?)([0-9]{3})(\\)?)(\\-?)([0-9]{2})(\\-?)[0-9](\\s?)([0-9]{2})(\\s?)(\\-?)([0-9]{2})$/';

if (preg_match($regexp, $text)) {
	echo "Верно\n";
} else {
	echo "Неверно\n";
}
if (preg_match($regexp, $text2)) {
	echo "Верно\n";
} else {
	echo "Неверно\n";
}
if (preg_match($regexp, $text3)) {
	echo "Верно\n";
} else {
	echo "Неверно\n";
}
if (preg_match($regexp, $text4)) {
	echo "Верно\n";
} else {
	echo "Неверно\n";
}