Possible to reduce complexity of fetching and displaying data? - php

Question

What I'm doing with the following code is fetching data from a table via PHP in order to display the data on a website.
$stri = "SELECT a, b, c, d, e, f FROM table";
$stat = $conn->prepare($stri);
if ($stat->execute()) {
while ($resu = $stat->fetch(PDO::FETCH_ASSOC)) {
foreach ($resu as $key=>$value) {
echo $value . "<br>";
}
echo "<br><br>";
}
}
However, it seems redundant to use two loops. Is there not a more efficient way to accomplish the same thing while allowing each item of each row to be handled independently?
I plan to do something like the following with it which is why I need to be able to handle the items independently.
if ($stat->execute()) {
while ($row = $stat->fetch(PDO::FETCH_ASSOC)) {
echo '<div class="row">';
foreach ($row as $key=>$value) {
echo '<div class=' .$key. '>';
if (empty($value)) echo '---<br>';
else echo $value;
echo '</div>';
}
echo '</div>';
}
}

Answer 1

However, it seems redundant to use two loops.
I cannot get what does it mean, but in all it's quite possible to reduce the complexity. For this you need to use PDO in the full force, not as a just a substitution for mysql_query(). A separation of concerns would also help
Get your data first in the form of array
$sql = "SELECT a, b, c, d, e, f FROM table";
$stmt = $conn->prepare($sql);
$stmt->execute();
$data = $stmt->fetchAll();
and then display it, somewhere inside the HTML part of the page
<?php foreach ($data as $row): ?>
<div class="row">
<?php foreach ($row as $key=>$value): ?>
<div class="<?=$key?>">
<?php if (!$value): ?>
---<br>
<?php else ?>
<?=$value?>
<?php endif ?>
</div>
<?php endforeach ?>
</div>
<?php endforeach ?>

Answer 2

function checking($val)
{
if(empty($val))
{
echo "---<br>";
}
else
{
echo $val;
}
}
$stri = "SELECT a, b, c, d, e, f FROM t";
try
{
$stat = $conn->prepare($stri);
$stat->execute();
$results = $stat->fetchAll(PDO::FETCH_ASSOC);
foreach ($results as $key=>$value)
{
echo implode('',array_map("checking",$value));
echo "<br><br>";
}
}
catch(Exception $e)
{
error_log($e->getMessage());
}
I do a little bit changed of your code. Instead of use if to catch error, I prefer to use try catch method.