<?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');
$wrongNumbers = 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 +
); 
 
$testNumber = '+7-(911)-50-65-656';
$regexp = '/^([+] 7|[+]7| 8|8)([(]|[)]|-| )*(\\d([(]|[)]|-| )*){9}\\d$/u';
$regexpOne = '/[+] 7|[+]7/';
$regexpTwo = '/[^0-9]/';
for ($i = 0; $i < count($correctNumbers); $i++) {
	if (preg_match($regexp, $correctNumbers[$i])) 
	{
	    echo "Номер {$correctNumbers[$i]} ";
	    echo "набран правильно, ";
        $result = preg_replace($regexpOne, '8',  $correctNumbers[$i]);
        $result = preg_replace($regexpTwo, '',  $result);
        echo "единый формат: {$result}\n";
     }
     else {
     	echo "Номер {$correctNumbers[$i]} ";
	    echo "набран неправильно\n";
	 }
}
for ($i = 0; $i < count($wrongNumbers); $i++) {
	if (preg_match($regexp, $wrongNumbers[$i])) 
	{
	    echo "Номер {$wrongNumbers[$i]} ";
	    echo "набран правильно, ";
        $result = preg_replace($regexpOne, '8',  $wrongNumbers[$i]);
        $result = preg_replace($regexpTwo, '',  $result);
        echo "единый формат: {$result}\n";
     }
     else {
     	echo "Номер {$wrongNumbers[$i]} ";
	    echo "набран неправильно\n";
	 }
}

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