Optimize query for mysql and php - magento

Question

I have table with fields like id,name and values like (1,"sony,nokia,htc"),(2,"sony")(3,"Samsung").I fetch the records but my logic goes longer than my expection.I want to exlode name if it contains "," and fetch unique records.My result will look like
Name array will be { 0 =>"sony",1=>"HTC",2=>"Nokia"}.My dummy logic is here (This is incomplete not working properly.)
<?php
$row = array("sony,htc,nokia","htc","sony");
foreach ($row as $key => $valuek) {
if(strpos($valuek['value'], ",") !== false)
{
$str[] = explode(",",$valuek['value'] )
?>
<option value="<?php echo $valuek['value']?>"><?php echo $valuek['value']?></option>
<?php
}
?>
<option value="<?php echo $valuek['value']?>"><?php echo $valuek['value']?></option>
<?php } $i++;}?>

Answer 1

You don`t need to do explode that
At the start where you get all your data and stored in array you can just used array_unique()
$row = array("sony,htc,nokia","htc","sony"); // all fetch data from db.
$row = implode(',',$row); // first convert the array -> strings
$row = explode(',',$row); // then return back to array and you can now use array_unique
$row = array_unique($row); // this will filter all data with uniqueness and drop some data that have same value
then you can use this to loop the data on.
for($i=0;$i<count($row)){
echo '<option value="'.$row[$i].'">'.$row[$i].'</option>';
}
this will make your code shorter and easy to manage..