<?php


$numbers = 
  '84951234567 +74951234567 8-495-1-234-567
   8 (8122) 56-56-56 8-911-1234567 8 (911) 12 345 67 
  8-911 12 345 67 8 (911) - 123 - 45 - 67 + 7 999 123 4567
  8 ( 999 ) 1234567 8 999 123 4567
  02 84951234567 позвать люсю 849512345 849512345678 
  8 (409) 123-123-123 7900123467 5005005001 8888-8888-88
  84951a234567 8495123456a   +1 234 5678901 +8 234 5678901
  7 234 5678901';


$regexp = "/^\\s?([+]\s*[7]|8)\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]\\W*[0-9]$/";

$regexpRepl = "/^\\([+]7)\\d{10}$/";

$CorrNumb = array();

if(preg_match($regexp, $numbers, $CorrNumb)) {
		var_dump($CorrNumb);

}

		$lenght = count($CorrNumb);
        echo $lenght;


?>