How to Use Dynamic Dropdown Selected value in Php - php

Question

Php/Html:
Here I add The all Countries list to add/edit page.But Edit page Want Value Selected in dropdown.please help
<select class="form-control" id="country_list" name="country">
<?php
global $wpdb;
$network_lists = $wpdb->get_results("SELECT * FROM media_countries");
foreach($network_lists as $network_list){
?>
<option value="<?php echo $network_list->country_name ?>" selected="<?php
echo $network_list->country_name ?>"><?php echo $network_list>country_name ?></option>
<?php }?>
</select>

Answer 1

This is how I would do it. This will check the value against the value the user selects with the value from the database and properly populate your dropdown menu.
global $wpdb;
$network_lists = $wpdb->get_results("SELECT * FROM media_countries");
echo
'<select class="form-control" id="country_list" name="country">';
foreach($network_lists as $network_list) {
if($_POST['country'] == $network_list->country_name) {
echo '<option value="' . $network_list->country_name . '"' . ' selected="selected"' . '>' . $network_list->country_name . '</option>';
}else {
echo '<option value="' . $network_list->country_name . '">' . $network_list->country_name . '</option>';
}
}
echo
'</select>';

Answer 2

Selected value is in $_POST['country'];
Try:
<select class="form-control" id="country_list" name="country">
<?php
global $wpdb;
$network_lists = $wpdb->get_results("SELECT * FROM media_countries");
foreach($network_lists as $network_list){
?>
<option value="<?php echo $network_list->country_name; ?>" <?php echo ( $_POST['country_name'] == $network_list->country_name ? 'selected' : '' ); ?>><?php echo $network_list>country_name; ?></option>
<?php }?>
</select>
The above code automatically selects the option that has value equals to the submitted $_POST['country'] value.