gistfile1.txt

<?php

function add_custom_item_to_menu( $items, $args ) {
    if ( $args->theme_location == 'primary-menu' ) {
    	$user = wp_get_current_user();
	    $user_meta = get_userdata($user->ID);
	    $user_role = $user_meta->roles[0];
	    if($user_role == 'um_employeur' || $user_role == 'administrator'){
            	$items .= "<li id='main-menu'><a href='https://monemploi.net/ajouter-un-emploi/'>Ajouter un emploi</a></li>";
             }
    }
    return  $items;
}
add_filter( 'wp_nav_menu_items', 'add_custom_item_to_menu', 10, 2 );

?>