How to put values without repeating inside a table - php

Question

I have a problem, I need put different values inside a table and I do not know how to make the structure.
These are the values in database:
|--------------|------------|-----------|----------|
| id_r_a_p_f | id_param | id_frec | value1 |
|--------------|------------|-----------|----------|
| 1 | Param1 | Frec1 | A |
|--------------|------------|-----------|----------|
| 2 | Param2 | Frec1 | B |
|--------------|------------|-----------|----------|
| 3 | Param3 | Frec1 | C |
|--------------|------------|-----------|----------|
| 4 | Param4 | Frec1 | D |
|--------------|------------|-----------|----------|
| 5 | Param1 | Frec2 | E |
|--------------|------------|-----------|----------|
| 6 | Param2 | Frec2 | F |
|--------------|------------|-----------|----------|
| 7 | Param3 | Frec2 | G |
|--------------|------------|-----------|----------|
| 8 | Param4 | Frec2 | H |
|--------------|------------|-----------|----------|
and this is what I want in my view
|--------------|------------|-----------|
| Param | Frec1 | Frec2 |
|--------------|------------|-----------|
| Param1 | A | E |
|--------------|------------|-----------|
| Param2 | B | F |
|--------------|------------|-----------|
| Param3 | C | G |
|--------------|------------|-----------|
| Param4 | D | H |
|--------------|------------|-----------|
Not matter what I do the result is the same, the param repeat instaed of be diferent.
I catch de value fron database OK, but I do not know how put in this style in the view. I let you my view code if work for anything.
<table>
<tbody>
<tr>
<td> Param </td>
<?php
$cont_frec = 0;
foreach ($query_frec->result() as $frec) {
?>
<td>
<?php echo $frec->frec; ?>
</td>
<?php
$cont_frec++;
}// end foreach frec
?>
</tr>
<?php
$previous_frec = '';
for ($rel = 0; $rel < $cont_eval_x_frec; $rel++) {
if ($prev_param != $list_eval_x_frec[$rel]['id_param']) {
?>
<tr>
<td>
<?php echo $list_eval_x_frec[$rel]['id_param']; ?>
</td>
<?php
}
$previous_frec != $list_eval_x_frec[$rel]['id_frec'];
?>
<td>
<?php echo $list_eval_x_frec[$rel]['value_1']; ?>
</td>
<?php
}// for rel
?></tr>
</tbody>
</table>

Answer 1

Well I am not the most experienced PHP Coder out there but my approach would be to first build an array with your query to something like this:
$table_frec = array();
while($row = $query_frec->fetch_assoc()){
$table_frec[$row['id_param']][$row['id_frec']] = $row['value1']
}
This will give you an array that looks like:
$table_frec {
[Param1]=>{
[Frec1]=>"A"
[Frec2]=>"B"
}
[Param2]=>{
[Frec1]=>"C"
[Frec2]=>"D"
}
...
}
Then you can build your table using that array.