Query dont want to show all related post from table - php

Question

I try to retrive all rows related to the specific category(continent table) but it only shows one and not all.
<?php
$townid = $_GET['id'];
$query = "SELECT * FROM towns INNER JOIN continents ON towns.catid = continents.id WHERE continents.id = '$townid'";
$row = mysqli_fetch_assoc(mysqli_query($link, $query));
// The category/Continent
echo '<h1>';
echo $row['catname'];
echo '</h1>';
//The post name/Town name
echo $row['title'];
?>

Answer 1

You need to call mysqli_fetch_assoc() in a loop.
$result = mysqli_query($link, $query);
$first = true;
while ($row = mysqli_fetch_assoc($result)) {
if ($first) { // Only show the category header once.
// The category/Continent
echo '<h1>';
echo $row['catname'];
echo '</h1>';
$first = false;
}
//The post name/Town name
echo $row['title'];
}

Answer 2

You can do something like:
<?php
$townid = $_GET['id'];
$query = "SELECT * FROM towns INNER JOIN continents ON towns.catid = continents.id WHERE continents.id = '$townid'";
$rows = mysqli_fetch_all(mysqli_query($link, $query), MYSQLI_ASSOC);
// The category/Continent
foreach ($rows as $row) {
echo '<h1>';
echo $row['catname'];
echo '</h1>';
//The post name/Town name
echo $row['title'];
}
?>
On another note, its better to parameterised your query since you are getting the $townid from a GET params.
This is how to do it in PHP https://www.php.net/manual/en/mysqli-stmt.bind-param.php