foreach ( $params['change'] as $entry ) {
$array = explode( '=', $entry, 2 );
$changes[$array[0]] = isset( $array[1] ) ? $array[1] : null;
foreach ( $params['change'] as $entry ) {
$array = explode( '=', $entry, 2 );
$changes[$array[0]] = isset( $array[1] ) ? $array[1] : null;