How to insert values into a database from input that is dynamically generated

You can generate the form dynamically using HTML input array.

<?php $fruits = ['apple', 'orange', 'strawberry', 'pear'] ?>

<form method="POST" action="action.php">
    <?php for ($i=0; $i < count($fruits); $i++): ?>
        <input type="text" name="fruits[<?php echo $i ?>]" value="<?php echo $fruits[$i] ?>" />
    <?php endfor ?>
    <input type="submit" value="Submit" />
</form>

On the example above, you generate an input type with name fruits. Then, you submit the form into action.php (see the code below).

<?php

$fruits = $_POST['fruits'];
var_dump($fruits);

And the result, when you run it on the browser is below.

array (size=4)
  0 => string 'apple' (length=5)
  1 => string 'orange' (length=6)
  2 => string 'strawberry' (length=10)
  3 => string 'pear' (length=4)

Hope it helps.

Use this form :

<form class="form-horizontal"  method="POST" action="ajouterProduit4" name="formulaire">                
<div class="panel panel-default tabs">                            
<ul class="nav nav-tabs" role="tablist">
    <li class="active"><a href="ajouterProduit2"><button name="btn2" style="background: transparent; border: none;">Fiche Technique</button></a></li>

</ul>
<div class="panel-body tab-content">

    <div class="tab-pane active" id="tab-second">

        <?php 
            $reqt1 = "SELECT c.Libelle,c.ID FROM caracteristique c,fichetechnique f WHERE c.fichetechniqueID=f.ID AND c.fichetechniqueID='$categorie' LIMIT 0,10";
            $reqt2 = "SELECT c.Libelle,c.ID FROM caracteristique c,fichetechnique f WHERE c.fichetechniqueID=f.ID AND c.fichetechniqueID='$categorie' LIMIT 10,10";
            $rest1=mysqli_query($conne,$reqt1);
            $rest2=mysqli_query($conne,$reqt2);
        ?>
        <div class="col-md-6" id="txtHint">
            <?php
                while ($rowt1= mysqli_fetch_row($rest1)) {
            ?>
            <div class="form-group">
                <label class="col-md-3 control-label"><?php echo $rowt1[0] ?></label>
                <div class="col-md-9">                                            
                    <div class="input-group">
                        <span class="input-group-addon"><span class="fa fa-pencil"></span></span>
                        <input  name="rowt1[]" value="<?php echo $rowt1[1]; ?>" type="text" class="form-control" />

                    </div>                                            

                </div>
            </div> 
                <?php }  ?>
        </div>

        <div class="col-md-6">
            <?php
                while ($rowt2= mysqli_fetch_row($rest2)) {
            ?>
        <div class="form-group">
            <label class="col-md-3 control-label"><?php echo $rowt2[0] ?></label>
            <div class="col-md-9">                                            
                <div class="input-group">
                    <span class="input-group-addon"><span class="fa fa-pencil"></span></span>
                    <input name="rowt2[]" value="<?php echo $rowt2[1]; ?>" type="text" class="form-control"/>
                </div>                                            
            </div>
        </div>
            <?php } ?>
        </div>

    </div>                                        

</div>
            <div class="panel-footer">
                <input type="reset" class="btn btn-default" value="Réinitialiser">
                <button name="envoyer" class="btn btn-primary pull-right">Etape 3 <span class="fa fa-arrow-right fa-right"></span></button>
            </div>  
</div>

</div>                                

</form>

In the server side:

<?php 
$rowt1=$_REQUEST['rowt1'];// will return post array due to the declaration in the form as rowt1[]
$rowt2=$_REQUEST['rowt2'];// will return post array due to the declaration in the form as rowt2[]
foreach ($rowt1 as $key => $value) {
    $sql="INSERT INTO TABLENAME1 ('rowt1') VALUES ('".$value."')";
    // run the query
}
foreach ($rowt2 as $key => $value) {
    $sql="INSERT INTO TABLENAME2 ('rowt2') VALUES ('".$value."')";
    // run the query
}
?>

Hope this may solve your problem. Thanks.