Ip2location plugin in my template header?

I’m assuming you’re using “IP2Location Tag WordPress Plugin”.

In main file of IP2Location plugin, the class instance is created and assigned to the variable.

$ip2location_tags = new IP2LocationTags();

To use the plugin in theme, just use the global variable $ip2location_tags.
Remember to make sure that the class IP2LocationTags exists first and use global keyword.

if (class_exists('IP2LocationTags')) {
    global $ip2location_tags;
    $location = $ip2location_tags->get_location('IP_ADDRESS');
}

The plugin sets the IP address in this way (in parse_content method):

$ip_address = $_SERVER['REMOTE_ADDR'];

if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && filter_var($_SERVER['HTTP_X_FORWARDED_FOR'], FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
    $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
}

Keys in the location data table:

ipAddress,
countryCode,
countryName,
regionName,
cityName,
latitude,
longitude,
isp,
domainName,
zipCode,
timeZone,
netSpeed,
iddCode,
areaCode,
weatherStationCode,
weatherStationName,
mcc,
mnc,
mobileCarrierName,
elevation,
usageType,

---

In functions.php file add function:

if ( !function_exists( 'ip2loc_get_region' ) ) {
    function ip2loc_get_region() {
        global $ip2location_tags;

        if ( !class_exists('IP2LocationTags') )
            return '';

        $ip_address = $_SERVER['REMOTE_ADDR'];

        if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && filter_var($_SERVER['HTTP_X_FORWARDED_FOR'], FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
            $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
        }

        $location = $ip2location_tags->get_location($ip_address);
        if ( !$location )
            return '';

        return $location['regionName'];
    }
}

File header.php:

<?php

$def_header_text = esc_html__( 'This is Header Media Text.', 'cleanportfolio' );

if ( current_user_can( 'edit_theme_options' ) ) {
    $def_header_text .= '&nbsp;' . esc_html__( 'Edit this from Appearance - Customize - Header Media - Header Media Text.', 'cleanportfolio' );
}

$header_media_text = get_theme_mod( 'cleanportfolio_header_media_text', $def_header_text );

if ( is_front_page() && ( has_custom_header() || '' !== $header_media_text ) ) : ?>

    <?php // text to display
    $region_name = " " . ip2loc_get_region(); ?>

    <div class="custom-header">
        <?php
        if ( has_custom_header() ) : ?>
            <div class="custom-header-media">
                <?php the_custom_header_markup(); ?>
            </div>
        <?php endif; ?>

        <div class="custom-header-content sections header-media-section">

        <?php if ( '' !== $header_media_text ) : ?>
            <h2 class="section-title"><?php echo esc_html( $header_media_text ) . esc_html($region_name); ?></h2>
        <?php endif; ?>

        </div>
        <?php if ( ! has_custom_header() ) : ?>
            <div class="square"><?php echo cleanportfolio_get_svg( array(
                'icon' => 'square',
            ) ); ?><span class="screen-reader-text"><?php esc_html_e( 'Square', 'cleanportfolio' ); ?></span></div>
        <?php endif; ?>

    </div><!-- .custom-header -->