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Thread: Order mysql results following a function

  1. #1
    Join Date
    Aug 2012
    Posts
    10

    Order mysql results following a function

    Hello,

    In my database, I have two variables "longitude" and "latitude". I use a function to know the distance between the user and the element in my database, for instance a touristic site.

    The problem is to order results knowing that my distance variable ($longueur) is defined in my while loop for each result so i can't use a ORDER BY

    Thanks in advance for your tips

    PHP Code:
    <?php
    $query
    ="SELECT * FROM matable WHERE Statut>='0'";
    $db->setQuery($query);
    $rs=$db->query();
    function 
    get_distance_m($Lat$Long$user_Lat$user_Long) {...}
    while(
    $row=mysqli_fetch_array($rs)){
    $Lat=$row['Lat'];
    $Long=$row['Long'];
    $longueur=round(get_distance_m($Lat$Long$user_Lat$user_Long) / 10003);
    ?>
    ... HTML Code ...

  2. #2
    Join Date
    Jul 2013
    Posts
    1
    On each iteration you should add $longueur to an array and then order the array.

    Something like this:

    PHP Code:
    //Outside the loop
    $items = array(); //Or $items = []; if you are using PHP 5.4 or above

    //Inside the loop do this
    $items[] = round(get_distance_m($Lat$Long$user_Lat$user_Long) / 10003); 
    Then after you can use sort() to sort the array.

    Hope that helps.

  3. #3
    Join Date
    Aug 2012
    Posts
    10
    Thanks for help.

    I tried your approach but i can't work with the $items array as if i echo it i only get Array Array ... with no values.

    I am a beginner with php, perhaps i missed something

    I put my complete code so far :

    PHP Code:
    <?php
    if(isset($_GET['cord'])){
    $cord$_GET['cord'];
    list(
    $user_Lat,$user_Long) = explode("-"$cord);

    $query="SELECT * FROM table WHERE Statut>='0'";
    $db->setQuery($query);
    $rs=$db->query();

    echo
    '<table>';

    function 
    get_distance_m($Lat$Long$user_Lat$user_Long) {...}
    $longueur = array();

    while(
    $row=mysqli_fetch_array($rs)){
    $Lat=$row['Lat'];
    $Long=$row['Long'];
    $longueur[]=round(get_distance_m($Lat$Long$user_Lat$user_Long) / 10003);

    //echo "$longueur";
    //folowing is previous code where i putted $longueur alone without sorting

    if ($longueur<="3") {
    ?>
    <tr class="tr">
    <td style="height:100"><a href="http://mobile.monsite.net/index.php/donnees.html?value=<?php echo"$row[Identifiant]"?>"><img src="http://mobile.monsite/images/uploaders/<?php echo"$row[Identifiant]/Images/Logo/logo.jpg"?>" alt="Logo" width="100" height="100"/></a></td>
    <td>
    <p>
    <?php if ($longueur<=0.1){echo'<span class="distance">A moins de 100 m</span><br/>';} 
    elseif (
    $longueur>0.1 AND $longueur<=0.2){echo'<span class="distance">A moins de 200 m</span><br/>';}
    elseif (
    $longueur>0.2 AND $longueur<=0.3){echo'<span class="distance">A moins de 300 m</span><br/>';}
    elseif (
    $longueur>0.3 AND $longueur<=0.4){echo'<span class="distance">A moins de 400 m</span><br/>';}
    elseif (
    $longueur>0.4 AND $longueur<=0.5){echo'<span class="distance">A moins de 500 m</span><br/>';}
    elseif (
    $longueur>0.5 AND $longueur<=1){echo'<span class="distance">A moins d\'1 km</span><br/>';}
    elseif (
    $longueur>AND $longueur<=2){echo'<span class="distance">Entre 1 et 2 Km</span><br/>';}
    else   {echo
    '<span class="distance">A plus de 2 km</span><br/>';} ?>
    <span class="magenta"><?php echo"$row[Identite]"?></span><br/>
    <?php echo"$row[categorie]"?>
    </p>
    </td>
    </tr>
    <?php
    }}
    echo
    '</table>';
    ?>

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