<?php
 
$regexp         = '/^(\\s*([+]\\s*7|8))(\\W*\\d){10}$/';
$regSymbolClean = '/\\W/';
$regCodeClean   = '/^(7)/';
 
$correctNumbers = [ 
  '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', 
  '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'
];
 
$match          = [];
 
foreach ($correctNumbers as $key) {
		 if (preg_match($regexp, $key, $match)) {
		 $сleanNumber = preg_replace ($regSymbolClean, "", $match[0]);
		 $standNumber = preg_replace ($regCodeClean, "8", $сleanNumber);
		 echo "Стандартный номер {$standNumber}\n";
		 }
}

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