<?php
 
error_reporting(-1);
 
$regexpPattern = "/^((\+7)|8)[0-9]{10}$/";
 
$phoneNumbers = [
 
  '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', /* неверный код страны */
 
  '+8 234 5678901', /* либо 8 либо +7 */
 
  '7 234 5678901', '++7-690-503-30-01', '8--900---300-54-30     '
 
];
 
foreach ($phoneNumbers as $number) {
        $number = preg_replace("/[^0-9|^+]/",'',$number);
        if (preg_match($regexpPattern,$number)) {
                echo "{$number}<br>\n";
        }
}
 

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