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Get value from dropdownlist

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Good evening,

i have a problem with some code. I´ve created a dropdownlist that gests it´s values from a database. 

The dropdownlist is being populated without problems. My problem is that i must get the selected value from the

dropdown to complete my task. But i don´t know how. I´d appreciate some help. I send some of the code:


echo'  <form action="permissions.php" method="post" id="form">

     <table><tr><td>Seleccionar Utilizador:</td><td><select name="utilizadores" id="utilizadores">';
$query = mysql_query("SELECT * FROM `users`");
echo'<option value="">****** Utilizador *******</option>';
 while(($row = mysql_fetch_array($query))!== false)
    echo '<option value="'.$row["user_id"].'">'.$row["first_name"].' '.$row["last_name"].'</option>';
echo '</select></td>
I must get the value selected by the user, without posting because i have to use that value for a database search, so i can
display further values. Appreciated some help. I´m desperate :-(
Many thanks,
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You need to check if the posted value is the same as the value you're adding to the list, then you can set the selected attribute to the option.

while(($row = mysql_fetch_array($query))!== false)
    $selected = (isset($_POST['utilizadores']) && $row['user_id'] == $_POST['utilizadores']) ? ' selected' : '';
    echo '<option value="'.$row["user_id"].'"'.$selected.'>'.$row["first_name"].' '.$row["last_name"].'</option>';
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