<?php
 
error_reporting(-1);
 
$correctNumbers = [ 
  '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'
];
 
$incorrectNumbers = [
  '02', '84951234567 позвать люсю', '849512345', '849512345678', 
  '8 (409) 123-123-123', '7900123467', '5005005001', '8888-8888-88',
  '84951a234567', '8495123456a', 
  '+1 234 5678901', /* неверный код страны */
  '+8 234 5678901', /* либо 8 либо +7 */
  '7 234 5678901' /* нет + */
];
 
$allNumbers = [$correctNumbers, $incorrectNumbers];
$pattern = "/^(8|\\+\\s?7)([\\s\\(-]*\\d[\\s\\)-]*){10}$/";
$patterns = ["/^(8|\\+\\s?7)/", "/[\\s\\(\\)-]/"];
$replaces = ["8", ""];
 
foreach ($allNumbers as $oneOflists) {
	foreach ($oneOflists as $number) {
		if (preg_match($pattern, $number)) {
          echo "Номер '{$number}' введен верно! ";
          $number = preg_replace($patterns, $replaces, $number);
          echo "Форм.: {$number}\n";
		} else {
          echo "Номер '{$number}' введен неверно!\n";
		}
	}
}

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