Wordpress filter to highlight the menu item labeled "blog" if not on static pages. Add the code to functions.php

gistfile1.php

/* ------------------------------------------------------------------------ */
/* highlight the menu item labeled "blog" if not on static pages */    

function add_custom_class($classes=array(), $menu_item=false) {
    if ( !is_page() && 'Blog' == $menu_item->title &&  ! in_array( 'current-menu-item', $classes ) ) {
        $classes[] = 'current-menu-item';        
    }                    
    return $classes;
}
add_filter('nav_menu_css_class', 'add_custom_class', 100, 2); 

Hi
I came across your code and it is exactly what I have been looking for and works like a charm. Thank you!
However I have got three different pages I would like to have highlighted separately (when on their relevant posts) and I can’t figure out how to do this. My PHP Knowledge is pretty limited as it stands. I’ve tried adding the code multiple times changing 'Blog' to my relevant titles which has made my site crash and when I try and add the other titles into your code, it either highlight all at the same time or creates a Wordpress error. If anybody can help me with this I’d be super grateful. For now I will continue trying;) Thanks!