gistfile1.php

<?php

$permissions = ACLField::hasAccess($field, $module, $GLOBALS['current_user']->id, $is_owner);
switch ( $permissions ) {
case 0:
    echo "No access to this field";
    break;
case 1:
    echo "Read-only access to this field";
    break;
case 2:
    echo "Write-only access to this field";
    break;
case 4:
    echo "Full read/write access to this field";
    break;
}