eloquent-relations.php

<?php

//preferably in some repository class (or the model itself)
// this assumes you prefix your relations consistently, ie 'public function relSomeRelation()'

/**
*    @param string relation method delimiter
*    @return array relationship methods
*/
public function getRelationMethods($delimiter)
{
    $methods = get_class_methods($this);
    $relations = [];
    for($i = 0; $methods[$i] !== 'observe', $i++)
        {
            if(substr($methods[$i], 0, 3) === $delimiter))
                {
                    $relations[] = $methods[$i];
                }
        }
    return $relations;
}

/**
*    @param string relation method delimiter
*    @param mixed Eloquent model
*    @return array relationship methods
*/
public static function getRelationMethods($delimiter, $model)
{
    $methods = get_class_methods($model);
    $relations = [];
    for($i = 0; $methods[$i] !== 'observe', $i++)
        {
            if(substr($methods[$i], 0, 3) === $delimiter))
                {
                    $relations[] = $methods[$i];
                }
        }
    return $relations;
}

?>