Button submit, gets the other buttons from the database - php

Question

This is my code so far:
require_once 'functions.php';
// makes the connection to the server to get the state button names
$query = "SELECT state FROM state";
$result = $connection->query($query);
if ($result === false) {
// error mssg
echo "<p>Query fout.</p>";
}
// button of the state gets the buttons of the city
if (isset($_POST['state'])) $state = $_POST['state']; {
query = "SELECT city FROM city='$cityid'";
$result = $connection->query($query);
} if ($result === false) {
// geef nette foutmelding
echo "<p>Query fout.</p>";
}
<?php
//gives the result to Submit html
while ($row = $result->fetch_assoc()) {
echo "<input type ='submit' name='provincie' value='".$row['provincie']."'>";
}
$result->free();
?>
</for
I would like to have a form submit button that gives a variable to PHP, depending on that variable, other buttons are created in the same form. So you can select a country and than you can select the cities in that country. I have the first button up and running. I thought I could just use the same submit button with the same variables. Because php would just rewrite the variables if there is a new input. But I think its not that simple, I don't know how to Google this question or that it is even something I should do with PHP instead of JavaScript/jQuery and just let the buttons hide and display and only use the last one to give an input with PHP.

Answer 1

you need to do the query result separately, so there should be two while statements
not the best way but here is one way i would do it:
require_once 'functions.php';
$query = "SELECT state FROM state";
if($query->num_rows > 0){
while($row= $result->fetch_assoc()) {
echo "<input type ='submit' name='provincie' value='".$row['provincie']."' onclick="sendVal(this.value)" >";
}
}
<script type="text/javascript">
function sendVal(item) {
document.cookie="city=" + item + ";";
location.reload();
}
</script>
<?php
if(!is_null($_COOKIE['city'])){
$retrievedcities= "SELECT city FROM city WHERE city ='".$_COOKIE['city']."'";
$con->query($retrievedcities);
while ($row = $result->fetch_assoc()) {
echo "<input type ='submit' name='citybut' value='".$row['city']."'>";
}
unset($_COOKIE['city']);
}
?>