mysql - sort calculation data to rank my data in php -


how can sort data give rate 5 stars, 4 stars, until 1 stars.

this query

function top5cust($tahun, $bulan) {     if ($tahun == 'semua' && $bulan == 'semua'){         $data = $this->db->query("select nama_jalan, no_rumah, jarak, kelurahan, kecamatan, kota, count(*) freq                                  t_cust group nama_jalan, no_rumah, jarak,kelurahan, kecamatan, kota                                  order freq desc limit 5");      }     else     {          $data = $this->db->query("select nama_jalan, no_rumah, jarak, kelurahan, kecamatan, kota, count(*) freq                                  t_cust                                 year(tgl_req) = $tahun , month(tgl_req) = $bulan                                 group nama_jalan, no_rumah, jarak, jarak,kelurahan, kecamatan, kota                                  order freq desc limit 5");     }                return $data->result();      }

and php code

<table>     <thead>     <tr>     <th><center>alamat</center></th>     <th><center>jarak</center></th>     <th><center>frekuensi</center></th>      <th><center>rate</center></th>     </tr>     </thead>     <tbody>     <?php      $cost=2000;     $totalbeli=50000;      foreach($top5cust $data){         $frekuensi=$data->freq;         $jaraks=$data->jarak;         $perhitunganrank=($frekuensi*$totalbeli)-($jaraks*$cost*$frekuensi);           echo "<tr>";         echo "<td>".$data->nama_jalan." no ".$data->no_rumah.", ".$data->kelurahan.", ".$data->kecamatan.", ".$data->kota."   </td>";         echo "<td>".$data->jarak."</td>";         echo "<td>".$data->freq."</td>";         echo '<td>'.$perhitunganrank.'</td>';         echo"</tr>";     }?>     </tbody> </table>

how can sort data , give rate $perhitunganrank without echo it. sorry if question not clear english not good.

regards, ridho

you can use usort, can see documentation here: http://php.net/manual/en/function.usort.php example in case be:

$cost=2000; $totalbeli=50000;  //we create empty array. need array because pdo resultsets iterable objects means can't iterate twice  $my_array = array();  //now put objects empty array. each row resultset new object.  foreach($top5cust $data){ // following shallow copy (using keyword 'clone'). ok long fields primitive variables.     $my_object = clone $data;     $my_object->perhitunganrank=($my_object->freq*$my_object->totalbeli)-($my_object->jarak*$cost*$my_object->freq);     array_push($my_array, $my_object); }  // need create function compares 2 objects , tells 1 comes first between two.  // function used usort. // function compares using property perhitunganrank.   function cmp($a, $b){     return strcmp($a->perhitunganrank, $b->perhitunganrank); }  // sort based on function above usort($my_array, "cmp");  //finally print array of objects sorted. foreach($my_array $row_to_print){     $counter =1;     echo "<tr>";     echo "<td>".$row_to_print->nama_jalan." no ".$row_to_print->no_rumah.", ".$row_to_print->kelurahan.", ".$row_to_print->kecamatan.", ".$row_to_print->kota."   </td>";     echo "<td>".$row_to_print->jarak."</td>";     echo "<td>".$row_to_print->frekuensi."</td>";     echo '<td>'.$row_to_print->perhitunganrank.'</td>';     echo '<td>'.$counter.'</td>';     echo"</tr>";     $counter++; }

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