MySQL - Select row values from url ID - php

Question

I created a table which is updated through a form and each row gets assigned a specific number.
When viewing this table, I want to click on that assigned number and get a page where all the details of that row are displayed.
If I do $sql = "SELECT * FROM clients WHERE nif_id='114522';"; - where the nif_id is the assigned number - I get the values for that number, but I need it to change with every number in the table.
Any ideas?
UPDATE
This is the table code:
<div class="card card-body">
<table class="table">
<thead>
<tr>
<th>NIF</th>
<th>Nome</th>
<th>Apelido</th>
<th>Telemóvel</th>
<th>E-mail</th>
</tr>
</thead>
<tbody>
<?php
include_once '../includes/db.inc.php';
$sql = "SELECT * FROM clients ORDER BY nif_id ASC;";
$result = mysqli_query($conn, $sql);
$resultCheck = mysqli_num_rows($result);
if ($resultCheck > 0) {
while ($row = mysqli_fetch_assoc($result)) {
$first = $row["prm_nome"];
$last = $row["apelido"];
$phone = $row['nmr_tlm'];
$email = $row['mail'];
$nif = $row['nif_id'];
echo '<tr>';
echo '<td>'.$nif.'</td>';
echo '<td>'.$first.'</td>';
echo '<td>'.$last.'</td>';
echo '<td>'.$phone.'</td>';
echo '<td>'.$email.'</td>';
echo '</tr>';
}
}
?>
</tbody>
</table>
</div>

Answer 1

You can use the get request parameters.
ex: www.myapp.com/table?id=3920393
add functionality in your PHP file as follows
if(isset($_GET["id"])){
$id = $_GET["id"];
$sql = "SELECT * FROM clients WHERE nif_id='".$id."';";
//make db call & display HTML
}
This is a very simple implementation and does not implement any security or SQL injection security. This was more of a conceptual answer as to how you can tackle your problem.

Answer 2

This is quite a common scenario for web-based systems.
<div class="card card-body">
<table class="table">
<thead>
<tr>
<th>NIF</th>
<th>Nome</th>
<th>Apelido</th>
<th>Telemóvel</th>
<th>E-mail</th>
</tr>
</thead>
<tbody>
<?php
include_once '../includes/db.inc.php';
$sql = "SELECT * FROM clients ORDER BY nif_id ASC;";
$result = mysqli_query($conn, $sql);
$resultCheck = mysqli_num_rows($result);
if ($resultCheck > 0) {
while ($row = mysqli_fetch_assoc($result)) {
$first = $row["prm_nome"];
$last = $row["apelido"];
$phone = $row['nmr_tlm'];
$email = $row['mail'];
$nif = $row['nif_id'];
echo '<tr>';
echo '<td>'.$nif.'</td>';
echo '<td>'.$first.'</td>';
echo '<td>'.$last.'</td>';
echo '<td>'.$phone.'</td>';
echo '<td>'.$email.'</td>';
echo '</tr>';
}
}
?>
</tbody>
</table>
</div>
where the detail.php is another page to query specific details regarding the query nifid.
As a reminder, if the data type of the column is INT, there is no need to use single quotes to surround the value in the SQL statement.
Sample detail.php:
<?php
if(!isset($_GET['nifid']) || (int)$_GET['nifid'] <= 0) {
// Invalid or missing NIFID
header('Location: table.php');
}
include_once '../includes/db.inc.php';
$id = (int)$_GET['nifid'];
$sql = "SELECT * FROM clients WHERE nif_id=$id";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
// TODO: display the result in whatever way you like
?>