fetch_array() non conservare ORDER BY da Query

Question

questo è il mio codice:

<?php 
header("Expires: Mon, 26 Jul 1990 05:00:00 GMT"); 
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); 
header("Cache-Control: no-store, no-cache, must-revalidate"); 
header("Cache-Control: post-check=0, pre-check=0", false); 
header("Pragma: no-cache"); 

//TESTING CONNECT 
include 'connect.php'; 
$mysqli = connectDB(); 
getWells(2, $mysqli); 

function getWells($company,$mysqli){ 
//include 'connect.php'; 
define("MAX_TOP", 96);//96 INCHES == 8 FEET 
define("BARRELS_PER_INCH", 1.67); 

//$company = $_GET['company']; 
//$mysqli = connectDB(); 

$count = 0; 
$sql = "SELECT wells.id, name, top, bottom, last_pulled, bbl_per_hour 
     FROM wells, history 
     WHERE company_id ='$company' 
     AND wells.id = well_id 
     AND last_record = 1;"; 

if($result = $mysqli->query($sql)) { 
    while($row = $result->fetch_array()){ 
     $well_name = $row['name']; 
     $well_id = $row['id']; 
     $last_bottom = $row['bottom']; 
     $last_pulled = $row['last_pulled']; 
     $bbl = $row['bbl_per_hour']; 

     $projected_fill = MAX_TOP - $last_bottom; 
     $projected_barrels = $projected_fill * BARRELS_PER_INCH; 
     $time_to_fill = $projected_barrels/$bbl; 
     $exploded_time = explode('.', $time_to_fill); 
     $hours = $exploded_time[0];      
     $frac_hours = '.'.$exploded_time[1]; 
     $minutes = floor($frac_hours*60); 
     $projected = strtotime($last_pulled." +".$hours." hours"." +".$minutes." minutes");    
     $projected_datetime = date("Y-m-d H:i:s",$projected);  

     $insert = "INSERT INTO temp_wells (well_id,well_name,last_pull,hrs_to_fill) 
        VALUES ('$well_id','$well_name','$last_pulled','$projected_datetime');"; 
     if(!$result2 = $mysqli->query($insert)){ 
      return "There was a problem inserting data into databse. Contact Larsoon Computer Services. - GetWells.php, Line 57 ".$mysqli->error; 
     } 
     else{ 
      $get_temp = "SELECT * FROM temp_wells 
         ORDER BY hrs_to_fill ASC;"; 
      if(!$result3 = $mysqli->query($get_temp)){ 
       return "There was a problem retrieving data. Contact Larson Computer Services. - GetWells.php, Line 63 ".$mysqli->error; 
      } 
      else{ 
       //echo var_dump($result3); 
       while ($row1 = $result3->fetch_array()) { 
        $o_well_id = $row1['well_id']; 
        $o_well_name = $row1['well_name']; 
        $o_pull_date = $row1['hrs_to_fill']; 

        //TESTING DATA OUTPUT 
        echo $o_well_id; 
        echo '<br>'; 
        echo $o_well_name; 
        echo '<br>'; 
        echo $o_pull_date; 
        echo '<br>'; 
        echo '<br>'; 

        //CREATE THE COUNTDOWN 
        $date = date('U', strtotime($o_pull_date)); 
        $difference = $date - date('U'); 
        $diff_days = floor($difference/(24*60*60)); 
        $diff_hours = floor($difference % (24 * 60 * 60)/3600); 
        $diff_min = floor(($difference % (24 * 60 * 60) % 3600)/60); 
        $diff_secs = floor((($difference % (24 * 60 * 60) % 3600)%60)/1); 

        if($diff_days <= 0){ 
         $countdown = "$diff_hours hrs $diff_min min"; 
        } 
        else{ 
         $countdown = "$diff_days days $diff_hours hrs $diff_min min"; 
        } 
        if($count == 0) { 
         $data_str = $o_well_id.'|'.$o_well_name.'|'.$countdown; 
         $count++; 
        } 
        else { 
         $data_str = $data_str.'|'.$o_well_id.'|'.$o_well_name.'|'.$countdown; 
        } 
       } 
      } 
     } 
     $truncate = "TRUNCATE TABLE temp_wells;"; 
     if(!$result4 = $mysqli->query($truncate)){ 
      return "There was a problem truncating table. Contact Larson Computer Services. ".$mysqli->error; 
     } 
    } 
}//END OF IF 
if($data_str == null && $data_str == ""){ 
    $data_str = 0; 
} 
return $data_str; 
} 

?> 

produce:

1 
ATESTWELL 
2012-08-17 14:55:37 

3 
HAMLET 1-11H 
2012-08-17 17:40:00 

4 
HAMLET 2-11H 
2012-08-17 18:47:14 

8 
DANIEL 1-33H 
2012-08-17 13:15:39 

6 
DANIEL 21-33H 
2012-08-19 13:47:16 

9 
FAVER 1-29H 
2012-08-17 14:31:00 

tabella assomiglia:

well_id  int(11) 

well_name varchar(50) 

last_pull datetime 

hrs_to_fill datetime 

Il che non è ordinato da campo datetime come dovrebbe essere. L'esecuzione della query su PHPMyadmin funziona correttamente, ma questo codice non è ... Qualche idea?

Grazie,

Luis

Answer 1

I vostri dati sono in realtà ordinato; se guardi da vicino, vedrai che per ciascun pozzetto ordina in base alla data/ora. Il motivo è che hai due loop, il ciclo interno viene eseguito tre volte, uno per ciascun pozzetto.

Potrebbe essere necessario spostare il ciclo interno dopo il ciclo esterno, in modo da popolare la tabella temp_wells nel primo ciclo e interrogarla nel secondo.