php - How do I populate a table with values from a dropdown box? -

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i have 3 tables , 2 dropdown boxes. have populated 2 of tables , entered values dropdown boxes. now, choose value both of dropdown boxes , put values third dropdown box.

    <fieldset>             <legend>new cast</legend>             <table>             <form action="04castdb.php" method="post">             </fieldset> <?php  $query = "select * dbhx_movie"; $result = mysql_query($query); if(!$result) {     die("query failed"); }     echo "<select name='movie'>";      while($row = mysql_fetch_array($result))     {         echo "<option value='$row[pk]'>$row[name]</option>";     }         echo "</select>movie</br>";      echo "<select name='actor'>";  $query = "select * dbhx_actor"; $result = mysql_query($query); if(!$result) {     die("query failed"); }  while($row = mysql_fetch_array($result)) {         echo "<option value='$row[pk]'>$row[surname]</option>";     }     echo "</select>actor</br>";     echo "<input type='submit' value='swag'/>"; ?> </table> </fieldset>

this code have used populate dropdown boxes. when press submit, doesn't enter data chosen values. can make sense of it?


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