How to get the highest value from a database row? - php

Question

I have a problem. I have a one page website and if there is posted a message a posts shows up and below the post there needs to be an image, but on the last on the index page I don't want an image to show up. So it's like if the id from the database is the highest that post doesn't get a image below it.
Here is the code:
<?php
include 'functions/image/functions.php';
$countQuery = $db->prepare("SELECT paginaNummer AS max FROM pages ;");
$countRow = $countQuery->fetch();
$maxId = $countRow['max'];
$query = $db->prepare("SELECT * FROM pages");
$query->execute();
$num_cols = 1;
$i = 0;
$imgList = getImagesFromDir($root . $path);
$img = getRandomFromArray($imgList);
while($row = $query->fetch()) {
if(isset($row)) {
echo "<section data-stellar-background-ratio='0.5'>";
echo "<div class='panelContainer'>";
echo "<div class='panel2'>";
echo "<div class='symbol3'></div>";
echo "</div>";
echo "</div>";
echo "</div>";
echo "</section>";
echo "<section class='wrapper'>";
echo "<div class='box'>";
echo "<div class='content'>";
echo $i++ % $num_cols == 0 ? '' : '';
echo "<div id='message'><h2> ", $row['berichtNaam'], "</h2>";
echo $row['paginaContent'], "<br />";
if (isset($_SESSION['login']['5']) && $_SESSION['login']['5'] == 2) {
echo " <a class='edit' href='functions/admin/edit.php?id=" . $pageNumber . " '>Edit</a>";
echo " <a class='delete' href='functions/admin/deletePost.php?id=" . $pageNumber . " '>Delete</a>";
} elseif (isset($_SESSION['login']['5']) && $_SESSION['login']['5'] == 1) {
echo " <a class='edit' href='functions/admin/edit.php?id=" . $pageNumber . " '>Edit</a>";
} else {
}
echo "</div>";
echo "</div>";
echo "</section>";
echo max($row);
if (count($row['paginaNummer']) == max($row)){
} else {
echo "<a href='/'><img src='<?php echo $path . $img ?>'alt=''/></a>";
}
echo "</section>";
}
}
echo "</div></div>";
?>
I won't get any further with this part I hope you can help me with this problem

Answer 1

It's hard to understand what you need. But try this query:
$countQuery = $db->prepare("SELECT paginaNummer AS max
FROM pages ORDER BY paginaNummer DESC LIMIT 1");
Or may be this:
$countQuery = $db->prepare("SELECT paginaNummer AS max
FROM pages ORDER BY id DESC LIMIT 1");
Update: this code changes instead of top:
<?php
include 'functions/image/functions.php';
$query = $db->prepare("SELECT * FROM pages");
$query->execute();
$maxrow = $query->rowCount();
$num_cols = 1;
$i = 0;
$imgList = getImagesFromDir($root . $path);
$img = getRandomFromArray($imgList);
$n = 0;
while($row = $query->fetch()) {
if(isset($row)) {
$n++;
echo "<section data-stellar-background-ratio='0.5'>";
echo "<div class='panelContainer'>";
echo "<div class='panel2'>";
echo "<div class='symbol3'></div>";
echo "</div>";
echo "</div>";
echo "</div>";
echo "</section>";
echo "<section class='wrapper'>";
echo "<div class='box'>";
echo "<div class='content'>";
echo $i++ % $num_cols == 0 ? '' : '';
echo "<div id='message'><h2> ", $row['berichtNaam'], "</h2>";
echo $row['paginaContent'], "<br />";
if (isset($_SESSION['login']['5']) && $_SESSION['login']['5'] == 2) {
echo " <a class='edit' href='functions/admin/edit.php?id=" . $pageNumber . " '>Edit</a>";
echo " <a class='delete' href='functions/admin/deletePost.php?id=" . $pageNumber . " '>Delete</a>";
} elseif (isset($_SESSION['login']['5']) && $_SESSION['login']['5'] == 1) {
echo " <a class='edit' href='functions/admin/edit.php?id=" . $pageNumber . " '>Edit</a>";
} else {
}
echo "</div>";
echo "</div>";
echo "</section>";
echo max($row);
if ($n == $maxrow){
} else {
echo "<a href='/'><img src='<?php echo $path . $img ?>'alt=''/></a>";
}
echo "</section>";
}
}
echo "</div></div>";
?>