- substr: documentation ( source)
- var_dump: documentation ( source)
- rtrim: documentation ( source)
- strrpos: documentation ( source)
<?php
$row=array('_id' => 'ORD=298/HP/13^LN=3^RL=1^DM_ORD=G31308^DM_LN=2^DM_RL=1^DM_LN_IT=12345^');
$DM_LN_IT= rtrim(substr($row['_id'], strrpos($row['_id'], '=')+1),'^');
var_dump( $DM_LN_IT);