Live Reload Theme functions for Wordpress and Grunt-contrib-watch

functions.php

<?php

function removePortFromURL ( $url = false )
{

    if ( ! $url ) {
        return false;
    }

    $url = rtrim ( $url, '/' );
    $url = rtrim ( $url, ':' );
    $urlNoHTTP = substr ( $url, 0, -strpos ( $url, ':' ) );

    if ( false !== strpos ( $urlNoHTTP, ':') ) {
        $url = substr ( $url, 0, strrpos ( $url, ':' ) );
    }

    return $url;
}

function liveReload( $dev ) {

    if ( true === $dev ) {

        $url = removePortFromURL ();

        ?>
        <script src="<?= $url; ?>:35729/livereload.js"></script>
    <?php

    }

}