<?php
	error_reporting(-1);
	mb_internal_encoding('utf-8');
	
	function verificationPhone($pattern, $telephoneNumber){
		foreach($telephoneNumber as $value){
			if(preg_match($pattern, $value) === 1) {
				echo "{$value}\t-\tOK\n";
			}else{
				echo "{$value}\t-\tERROR\n";
			}
		}
	}
	
	// Правильные: 
	$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'
	);

	// Неправильные: 
	$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 + */
	);

	$pattern = "/^((\s*8\s*)|(\s*\+\s*7\s*))[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d[\s-\(\) ]*\d$/u";
	
	verificationPhone($pattern, $correctNumbers);
	echo "\n\n";
	verificationPhone($pattern, $incorrectNumbers);
?>