<?php
 
error_reporting(-1);
 
$correctNumbers = array( 
  '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', '8 4951234567'
);
 
$incorrectNumbers = array(
  '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 + */
);
 
$regexp = '/^\\ *(\\+\\ *7|8)((\\(|\\)|\\ |\\-)*[0-9]){10}$/u';
 
 
validate($correctNumbers, $regexp);
validate($incorrectNumbers, $regexp);
 
function validate($numbers, $regexp){
    foreach ($numbers as $number) {
        if (preg_match($regexp, $number)) {
            echo "Номер {$number} корректен\n";
        } else {
            echo "Номер {$number} некорректен\n";
        }
    }
}

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