Jquery Dependent DropDown List

<div class="frmDronpDown">
	<div class="row">
		<label>Country:</label><br/>
		<select name="country" id="country-list" class="demoInputBox" onChange="getState(this.value);">
		<option value="">Select Country</option>
		<?php
		foreach($results as $country) {
		?>
		<option value="<?php echo $country["id"]; ?>"><?php echo $country["name"]; ?></option>
		<?php
		}
		?>
		</select>
	</div>
	<div class="row">
		<label>State:</label><br/>
		<select name="state" id="state-list" class="demoInputBox">
		<option value="">Select State</option>
		</select>
	</div>
</div>


jQuery Dependent DropDown List – Countries and States

<script>
function getState(val) {
	$.ajax({
	type: "POST",
	url: "get_state.php",
	data:'country_id='+val,
	success: function(data){
		$("#state-list").html(data);
	}
	});
}
</script>

jQuery Dependent DropDown List – Countries and States

<?php
require_once("dbcontroller.php");
$db_handle = new DBController();
if(!empty($_POST["country_id"])) {
	$query ="SELECT * FROM states WHERE countryID = '" . $_POST["country_id"] . "'";
	$results = $db_handle->runQuery($query);
?>
	<option value="">Select State</option>
<?php
	foreach($results as $state) {
?>
	<option value="<?php echo $state["id"]; ?>"><?php echo $state["name"]; ?></option>
<?php
	}
}
?>