Add Site Verification Meta Tags

<?php
if ( ! function_exists( 'scseed_site_verification_tags' ) ) :
function scseed_site_verification_tags() {
    // Replace each string with your actual verification code; leave empty to skip.
    $google    = ''; // Google Search Console verification code
    $bing      = ''; // Bing Webmaster Tools verification code
    $yandex    = ''; // Yandex Webmaster verification code
    $pinterest = ''; // Pinterest domain verification code

    if ( $google ) {
        echo '<meta name="google-site-verification" content="' . esc_attr( $google ) . '">' . PHP_EOL;
    }
    if ( $bing ) {
        echo '<meta name="msvalidate.01" content="' . esc_attr( $bing ) . '">' . PHP_EOL;
    }
    if ( $yandex ) {
        echo '<meta name="yandex-verification" content="' . esc_attr( $yandex ) . '">' . PHP_EOL;
    }
    if ( $pinterest ) {
        echo '<meta name="p:domain_verify" content="' . esc_attr( $pinterest ) . '">' . PHP_EOL;
    }
}
add_action( 'wp_head', 'scseed_site_verification_tags' );
endif;