PHP Pagination for MySQL database - display the first page by default - php

Question

Code:
$totalItemsRequired = 8;
$query = "SELECT * FROM fruits ORDER BY origin ASC ";
$result = mysqli_query($connection, $query);
if ($result == false)
{
echo "<p>Selecting all fruits failed.</p>";
}
else
{
$totalRecords = mysqli_num_rows($result);
$totalPages = ceil($totalRecords / $totalItemsRequired);
echo "<p>Page: ";
for ($i = 1; $i <= $totalPages; $i++)
{
echo "<a href='?page=" . $i . "'>" . $i . "</a> ";
}
echo "</p>";
if (isset($_GET['page']))
{
$currentPageNum = $_GET['page'];
$offset = ($currentPageNum - 1) * $totalItemsRequired;
$query = "SELECT * FROM fruits " . "LIMIT " . $offset . ", " . $totalItemsRequired;
$result = mysqli_query($connection, $query);
if ($result == false)
{
echo "<p>Selecting subset (page) of fruits failed.</p>";
}
else
{
echo "<ul>";
while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC))
{
echo "<li>" . $row["id"] . "," . $row["name"] . ", " . $row["origin"] . ", " . $row["stock"] . "</li>";
}
echo "</ul>";
}
}
else
{
echo
// By default, load first page of records here
}
}
?>
Hi, I'm trying to load the first page of records by default where I have put the comment. There are no problems with the code, and the initial output is good. I'm just not sure how to show by default. Can anyone help please?
EDIT: Can anyone help?

Answer 1

Why not use LIMIT clause in your MySQL statement?
SELECT * FROM fruits ORDER BY origin ASC LIMIT 8 //First 8 rows of the table
SELECT * FROM fruits ORDER BY origin ASC LIMIT 8,8 //Second 8 rows
SELECT * FROM fruits ORDER BY origin ASC LIMIT 16,8 //Third 8 rows
In General:
LIMIT offset,row_count will return row_count rows starting from offset+1 row.

Answer 2

Instead of if statement, you should just be able to change
$currentPageNum = $_GET['page'];
$offset = ($currentPageNum - 1) * $totalItemsRequired;
to
$currentPageNum = isset($_GET['page']) ? $_GET['page'] : 0;
$offset = $currentPageNum > 0 ? (($currentPageNum - 1) * $totalItemsRequired) : 0;
Full code:
<?php
$totalItemsRequired = 8;
$query = "SELECT * FROM fruits ORDER BY origin ASC ";
$result = mysqli_query($connection, $query);
if ($result == false)
{
echo "<p>Selecting all fruits failed.</p>";
}
else
{
$totalRecords = mysqli_num_rows($result);
$totalPages = ceil($totalRecords / $totalItemsRequired);
echo "<p>Page: ";
for ($i = 1; $i <= $totalPages; $i++)
{
echo "<a href='?page=" . $i . "'>" . $i . "</a> ";
}
echo "</p>";
$currentPageNum = isset($_GET['page']) ? $_GET['page'] : 0;
$offset = $currentPageNum > 0 ? (($currentPageNum - 1) * $totalItemsRequired) : 0;
$query = "SELECT * FROM fruits " . "LIMIT " . $offset . ", " . $totalItemsRequired;
$result = mysqli_query($connection, $query);
if ($result == false)
{
echo "<p>Selecting subset (page) of fruits failed.</p>";
}
else
{
echo "<ul>";
while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC))
{
echo "<li>" . $row["id"] . "," . $row["name"] . ", " . $row["origin"] . ", " . $row["stock"] . "</li>";
}
echo "</ul>";
}
}
}
?>