<?php
 
error_reporting(-1);
 
//$telephone = "+7 - ( 911 ) - 50-65-6-5-6 ";
$rightTelephoneNumbers = 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');
$wrongTelephoneNumbers = 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 +
); 
$regexp = '/^\\s*(8|\\+\\s?7)([\\s-(]*)[0-9]{3}(([\\s-)(]*)[0-9]){7}([\\s-)(]*)$/';
echo "Проверка заведомо правильных номеров:\n";
foreach ($rightTelephoneNumbers as $telephone) {
    if (preg_match($regexp, $telephone)) {
	    echo "Номер \"{$telephone}\" введён верно!\n";
    } else {
	    echo "Номер \"{$telephone}\" введён неверно! Пожалуйста, введите номер из 11 цифр, начинающийся с 8 или +7!\n";
      }
}
echo "\nПроверка заведомо неправильных номеров:\n";
foreach ($wrongTelephoneNumbers as $telephone) {
	if (preg_match($regexp, $telephone)) {
		echo "Номер \"{$telephone}\" введён верно!\n";
	} else {
		echo "Номер \"{$telephone}\" введён неверно! Пожалуйста, введите номер из 11 цифр, начинающийся с 8 или +7!\n";
	}
}
?>

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