Get selected dropdown option from database using PHP - php

Question

I have a dropdown section menu that I need to set the selected value based on the database values.
I have a table with the following structure: id, pid, disporder, title, url
I am then using this code for the dropdown:
echo "<select name=\"parent\" id=\"parent\">\n";
echo "<option value=\"0\">No Parent</option>";
$query = $db->simple_select("navbar", "*", "pid='0'");
while($parent = $db->fetch_array($query))
{
echo "<option value=\"".$parent['id']."\">".$parent['title']."</option>";
}
echo "</select>";
How would I go by getting the selected value based on what's in the database?
I have multiple entries in the table, so using an array with values (similar to this), isn't what I want to use:
$options = array('1', '2', '3');
foreach($options as $option)
{
if($option = $parent['id'])
{
echo "selected";
}
else
{
echo "";
}
Thanks.

Answer 1

You haven't really given enough info to really say what the exact solution would be. If you're creating a select tag in PHP though, the typical pattern for building the markup is:
<?php
$options = get_me_some_options();
$select_markup = '<select name="my-select" id="my-select>';
foreach ($options as $key => $val) {
$selected = '';
if (is_this_selected($val)) {
$selected = 'selected';
}
$select_markup .= "<option $selected val=\""
. $val['id'] . "\">" . $val['name'] . '</option>';
}
echo $select_markup . "</select>";
It looks like your use case is similar, but slightly more complex. Ultimately though what matters is that, inside the loop, you have some way to determine whether a given row should be 'selected' or not.

Answer 2

If I understand correctly, you want to compare each $parent['id'] with the values of an array called $options. Try this:
$options = array('1', '2', '3');
echo "<select name=\"parent\" id=\"parent\">\n";
echo "<option value=\"0\">No Parent</option>";
$query = $db->simple_select("navbar", "*", "pid='0'");
while($parent = $db->fetch_array($query))
{
$selected = ( in_array($parent['id'], $options) ? ' selected' : '';
echo "<option value=\"".$parent['id']."\"$selected>".$parent['title']."</option>";
}
echo "</select>";

Answer 3

If you're trying to use this in multiselects then this might help
<?php
$optionsToSelect=array(1,2,3);
?>
<select name="parent" id="parent">
<?php
foreach($allOptions as $opt){
?>
<option value="<?php echo $opt['value'];?>" <? echo $opt['selected']==1?'selected="selected"':'';?>><?php echo $opt['optTitle'];?><option>
<?php
}
?>
</select>