PHP Like Help

Hello Guys,

I have a system that generate project numbers. The system is:

YEAR - PROJECT NUMBER . Sub ID

2014.1065.02

I want to be able to search my database for the sub ID's belonging to a project. I have tried using wildcards, but they don't seem to do what I want. Could you please tell me where I'm going wrong?

$project_id = $_SESSION['PROJECT'];
$project_id_trim = substr($project_id, 0,-3);
$trim = mysql_real_escape_string($project_id_trim);
echo $trim;

$result = mysql_query("SELECT * FROM `Project_subhire` WHERE `Subhire_id` LIKE '%$trim%'");




while ($row = mysql_fetch_array($result)) 
{
$project_results = $row['Project_id'];
}

Thanks