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@ 2017-07-11T11:21:50Z

<?php
    function validatePhone( $phone, &$errsData = null, &$mainData = null )
    {
        $res = false;        

        if( isset( $phone ) && $phone != null )            
        {
            $phone = preg_replace("/[^0-9]/","", $phone ); //удаляем всё кроме цифр
            if ($phone && preg_match('/^(8|7|\+7)[0-9]{10}$/', $phone )) {
//                if( substr( $phone, 0, 1) == '8' )
                $phone[0] = '7';
                @$mainData['phone'] = $phone;
                $res = $phone;
            } else 
            {
                $errsData['phone']['error_msg'] = "Укажите номер в формате +7 000 000 00 00";
            }            
        } else {
            $errsData['phone']['error_msg'] = "Укажите Ваш номер телефона";
        }

        return $res;
    }
    
    var_dump ( validatePhone('+79278918933') );
    
    
?>

Output for git.master, git.master_jit, rfc.property-hooks: string(11) "79278918933"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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