My search didn't work - php

Question

My search won't work and I don't know why. I would like to search for clients or tickets in my database. When I click on search while the SEARCH field ( input) is empty I get all clients BUT when I type some thing into the field I get nothing. Here is the code :
<table class="table table-bordered" id="datatable">
<thead>
<tr>
<th width="6%">name</th>
<th width="6%">prenom</th>
<th width="12%">adresse</th>
<th width="3%">codepost</th>
<th width="6%">ville</th>
<th width="5%">telephone</th>
<th width="8%">email</th>
<th width="6%">type</th>
<th width="5%">Action</th>
</tr>
</thead>
<tbody>
<?php
require 'database.php';
$db = Database::connect();
$statement = $db->query("SELECT * FROM clients WHERE 'prenom' LIKE '%" . $_POST['prenom'] . "%' ORDER BY client_id DESC" );
while($item = $statement->fetch())
{
echo '<tr>';
// echo '<td>'. $item['id'] . '</td>';
echo '<td>'. $item['name'] . '</td>';
echo '<td>'. $item['prenom'] . '</td>';
echo '<td>'. $item['adress'] . '</td>';
echo '<td>'. $item['codepost'] . '</td>';
echo '<td>'. $item['ville'] . '</td>';
echo '<td>'. $item['telephone'] . '</td>';
echo '<td>'. $item['email'] . '</td>';
echo '<td>'. $item['type'] . '</td>';
echo '<td width=150>';
echo '<a class="btn btn-default " href="view.php?id='.$item['client_id'].'"><span class="glyphicon glyphicon-eye-open"></span></a>';
echo ' ';
echo '<a class="btn btn-primary" href="update.php?id='.$item['client_id'].'"><span class="glyphicon glyphicon-pencil"></span></a>';
echo ' ';
echo '<a class="btn btn-danger" href="deleteclient.php?id='.$item['client_id'].'"><span class="glyphicon glyphicon-remove"></span> </a>';
echo '</td>';
echo '</tr>';
}
Database::disconnect();
?>
</tbody>
</table>

Answer 1

i finaly did it .. thanks to who helped me (
Sam Onela ) here is the code if some one need ``it := `
name
prenom
adresse
codepost
ville
telephone
email
type
Action
prepare(" SELECT * FROM clients WHERE name LIKE ? ");
$req->execute(array('%' .$searchq. '%')) ;
$count = $req->rowCount();
echo " $count Résulta(s) trouvé pour <strong >$searchq></strong><hr/> " ;
while($data = $req->fetch()) {
echo '<tr>';
echo '<td>'. $data['name'] . '</td>';
echo '<td>'. $data['prenom'] . '</td>';
echo '<td>'. $data['adress'] . '</td>';
echo '<td>'. $data['codepost'] . '</td>';
echo '<td>'. $data['ville'] . '</td>';
echo '<td>'. $data['telephone'] . '</td>';
echo '<td>'. $data['email'] . '</td>';
echo '<td>'. $data['type'] . '</td>';
echo '<td width=150>';
echo '<a class="btn btn-default " href="view.php?id='.$data['client_id'].'"><span class="glyphicon glyphicon-eye-open"></span></a>';
echo ' ';
echo '<a class="btn btn-primary" href="update.php?id='.$data['client_id'].'"><span class="glyphicon glyphicon-pencil"></span></a>';
echo ' ';
echo '<a class="btn btn-danger" href="deleteclient.php?id='.$data['client_id'].'"><span class="glyphicon glyphicon-remove"></span> </a>';
echo '</td>';
echo '</tr>';
}
}
Database::disconnect();
?>
</tbody>
</table>`