@php
    $newTelephone = preg_replace('/[^0-9]/', '', $telephone);
    
    $first = mb_substr($newTelephone, 0, 1);
    
    if( $first == "7" ) {
        $plus = "+";
    } else {
        $plus = "";
    }
@endphp

<a class="{{ isset($class) ? $class : '' }}" href="tel:{{ $plus }}{{ $newTelephone }}">{{ $telephone }}</a>