我该如何选择合适的行?

Page 1 :

<div>
<?php
        $reponse = $db->query('SELECT * FROM societe;');

?>

    <table border=1>
        <form method="post" action="ModifSociete.php">
    <?php
        $increm = 1;
        while($donne = $reponse->fetch()){
    ?>
            <input type="hidden" value="<?php echo $donne['NomSoc']; ?>" name="nomSoc<?php echo $increm; ?>"/>
            <tr>
                <td><?php echo $donne['ID']; ?></td>
                <td><?php echo 'Societe '.$donne['NomSoc']; ?></td>
                <td><?php echo $donne['Lieu']; ?></td>
                <td><?php echo $donne['Mail']; ?></td>
                <input type="hidden" value="<?php echo $donne['ID']; ?>" name="getIdSoc<?php echo $increm; ?>"/>
                <td><input class="btn" type="submit" value="Modifier"/></td>
            </tr>

    <?php
        $increm++;
        }
        $reponse->closeCursor(); 

    ?>
            <input type="hidden" value="<?php echo $increm; ?>" name="nbIncrem"/>
        </form>
    </table><br/>
</div>  

Page 2 :

<form method="post" action="UpdateSociete.php">
<?php
//WHERE ID = "'.$_POST['getIdSoc'.$i.''].'"
    $getNomSoc = $db->query('SELECT * FROM societe;');

    $thisSociete =array();
    $i=0;
    while($data = $getNomSoc->fetch()){

        $thisSociete[$i]["NomSoc"] = $data['NomSoc'];
        $thisSociete[$i]["Lieu"] = $data['Lieu'];
        $thisSociete[$i]["Mail"] = $data['Mail'];
        $thisSociete[$i]["ID"] = $data['ID'];
        $i++;               
    }
    $j=1;

        $thisSocieteNom = "";
        $thisSocieteLieu = "";
        $thisSocieteMail = "";
        if($_POST['nomSoc'.$j.''] == $thisSociete[$j-1]["NomSoc"]){
            var_dump($_POST['nomSoc'.$j.'']);
            var_dump($thisSociete[$j-1]["NomSoc"]);

            $thisSocieteNom = $thisSociete[$j-1]["NomSoc"];
            $thisSocieteLieu = $thisSociete[$j-1]["Lieu"];
            $thisSocieteMail = $thisSociete[$j-1]["Mail"];
?>
            <input type="hidden" value="<?php echo $thisSociete[$j-1]["ID"]; ?>" name="getIdSocBis"/>
<?php
        }
        else{
            $j++;
        }

?>
<input type="hidden" value="kangourou" name="passwordAdmin" />
<div>
    <h4>Modifier la societe <?php //get le nom de la soiete ?> :</h4>
        <table>
            <tr>
                <td><label>Nom : </label></td>
                <td><input type="text" name="ajoutNomSoc" value="<?php echo $thisSocieteNom; ?>"></input></td></tr>
            <tr>
                <td><label>Lieu : </label></td>
                <td><input type="text" name="ajoutLieu" value="<?php echo $thisSocieteLieu; ?>"></input></td>
            </tr>
            <tr>
                <td><label>Mail : </label></td>
                <td><input type="text" name="ajoutMail" value="<?php echo $thisSocieteMail; ?>"></input></td>
            </tr>
        </table>
</div>
<input type="submit" value="Enregistrer"/>

My page 2 is used to update the information in the table from the first pages.

My problem is that i dont know how to select the row i want to update. With my code i always update the first but i dont know what i have to change to select the row i want.

What I want : My table has 4 column. The last one is the submit button. When i click on one of them I go on my second pages (where i can see the information od the row in the text input) and i can change the information of my row (the one where i clicked on the submit button).

How can i do that ?

P.S. : I tried to be the clearest i could...

You can use GET params to pass the ID from page 1 to page 2.

Change

<td><input class="btn" type="submit" value="Modifier"/></td>

To

<td><a href="ModifSociete.php?id=<?php echo $donne['ID']; ?>">Modifier</a></td>

In page 2, try to select the item you parse through GET params $_GET['id']

$getNomSoc = $db->query('SELECT * FROM societe WHERE ID = "' . $_GET['id'] . '";');

I don't think here you need to send post request. what you need to do is:

    while($donne = $reponse->fetch()){
?>
        <input type="hidden" value="<?php echo $donne['NomSoc']; ?>" name="nomSoc<?php echo $increm; ?>"/>
        <tr>
            <td><?php echo $donne['ID']; ?></td>
            <td><?php echo 'Societe '.$donne['NomSoc']; ?></td>
            <td><?php echo $donne['Lieu']; ?></td>
            <td><?php echo $donne['Mail']; ?></td>
            <input type="hidden" value="<?php echo $donne['ID']; ?>" name="getIdSoc<?php echo $increm; ?>"/>
            <td><a href="ModifSociete.php?id=<?php echo $donne['ID']; ?>">Modifier</a> </td>
        </tr>

on second page you will get unique ID which will help you to select record based on it