如何使用搜索PHP MySQL下拉列表

Question

I want my dropdown list with search php with mysql. This is my code:

<td> Urgency (SLA)*</td>
<td> : </td>
<td>
    <select name="sla">
    <?php 
        $sla = $slas->get_sla();
        echo '<option value="'.$slaval['slaid'].'" selected="selected">'.$slaval['namasla'].'</option>';
        foreach ($sla as $slaval) 
        {   
            echo '<option value="'.$slaval['slaid'].'">'.$slaval['namasla'].'</option>';
        }
    ?>
    </select>

Answer 1

Remove the first echo with option before foreach, $slasval outside the loop is undefined.

<td> Urgency (SLA)*</td><td> : </td>
<td>
  <select name="sla">
    <?php 
        $sla = $slas->get_sla();
        foreach ($sla as $slaval) 
        {
            echo '<option value="'.$slaval['slaid'].'">'.$slaval['namasla'].'</option>';
        }
    ?>
    </select>
</td>

Answer 2

 <td> Urgency (SLA)*</td><td> : </td> <td><select name="sla"> <?php $sla = $slas->get_sla(); foreach ($sla as $slaval) { echo '<option value="'.$slaval['slaid'].'">'.$slaval['namasla'].'</option>'; } ?> </select> 

In first echo you see that there is no variable by name of

 $slaval 

variable, the variable is available inside foreach loop.

Answer 3

Try using a Datalist It might help you in selecting the dropdown

<td> Urgency (SLA)*</td><td> : </td>
<td><select name="sla" list="selectlist">
<datalist id='selectlist'>
<?php 
     $sla = $slas->get_sla();
     echo '<option value="'.$slaval['slaid'].'" selected="selected">'.$slaval['namasla'].'</option>';
     foreach ($sla as $slaval) 
     {
     echo '<option value="'.$slaval['slaid'].'">'.$slaval['namasla'].'</option>';
     }
?>