/**
 * Little Green Man functions and definitions
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package WordPress
 * @subpackage LGM
 * @since Little Green Man 1.1
 */
/**
 * Create Meta Description - code from Greta Themes  https://gretathemes.com/seo-add-meta-tags-without-plugins
 */
function gretathemes_meta_description() {
    global $post;
    if ( is_singular() ) {
        $des_post = strip_tags( $post->post_content );
        $des_post = strip_shortcodes( $post->post_content );
        $des_post = str_replace( array("\n", "\r", "\t"), ' ', $des_post );
        $des_post = mb_substr( $des_post, 0, 300, 'utf8' );
        echo '<meta name="description" content="' . $des_post . '" />' . "\n";
    }
    if ( is_home() ) {
        echo '<meta name="description" content="' . get_bloginfo( "description" ) . '" />' . "\n";
    }
    if ( is_category() ) {
        $des_cat = strip_tags(category_description());
        echo '<meta name="description" content="' . $des_cat . '" />' . "\n";
    }
}

add_action( 'wp_head', 'gretathemes_meta_description');

function gretathemes_meta_tags() {
    echo '<meta name="meta_name" content="meta_value" />';
}
add_action('wp_head', 'gretathemes_meta_tags');