function DomainLiteral::convertIPv4ToIPv6

1 call to DomainLiteral::convertIPv4ToIPv6()

DomainLiteral::parse in vendor/egulias/email-validator/src/Parser/DomainLiteral.php

File

vendor/egulias/email-validator/src/Parser/DomainLiteral.php, line 148

Class

DomainLiteral

Namespace

Egulias\EmailValidator\Parser

Code

public function convertIPv4ToIPv6(string $addressLiteralIPv4) : string {
    $matchesIP = [];
    $IPv4Match = preg_match(self::IPV4_REGEX, $addressLiteralIPv4, $matchesIP);
    // Extract IPv4 part from the end of the address-literal (if there is one)
    if ($IPv4Match > 0) {
        $index = (int) strrpos($addressLiteralIPv4, $matchesIP[0]);
        
        //There's a match but it is at the start
        if ($index > 0) {
            // Convert IPv4 part to IPv6 format for further testing
            return substr($addressLiteralIPv4, 0, $index) . '0:0';
        }
    }
    return $addressLiteralIPv4;
}