<?php

error_reporting(-1);

$baseNumbers = [
  '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'
];

$regexp="/^(\\+7|8)([0-9]{10})$/ui";

foreach ($baseNumbers as $number) {
  $number1=$number;
  $correctedNumber=preg_replace("/[\\s-()]/u","",$number);
  if (preg_match($regexp,$correctedNumber)) {
  }
  else {
    echo "$number1 - номер не в правильном формате\n";
  }
}

?>