Limit fetch results by page - php

Question

this file is included in my index file, i want not more than 5 posts on page and under posts 1 2 3 4... and etc. (links to the next pages) and that it look like this index.php?page=2
Sorry for my bad grammar.
<?php
if(isset($_GET['post_edit'])) {
$p_id = $_GET['post_edit'];
$p_query = mysql_query("SELECT title, post FROM posts WHERE id='$p_id'");
$p_array = mysql_fetch_array($p_query);
$title = $p_array['title'];
$post = $p_array['post'];
}
?>
<?php
if(isset($_POST['edit'])){
$title_edit = $_POST['titleedit'];
$post_edit = $_POST['postedit'];
if(empty($title) or empty($post)){
echo "<p>Fields empty!</p>";
} else {
mysql_query("UPDATE posts SET title='$title_edit', post='$post_edit' WHERE id='$p_id'");
echo "Edit succesful!</br>";
header('location: index.php');
}
}
?>
<?php
if(isset($_GET['post_edit']) && !empty($_GET['post_edit'])){
include 'edit_post.php';
} else {
?>
<?php
$query = mysql_query("SELECT * FROM posts ORDER BY date DESC");
while($row = mysql_fetch_array($query)){
echo "<div class='poststitle'>";
echo "<div style='font-weight: bold;'>";
echo $row['title'];
echo "</div>";
echo "</div>";
echo "<div class='posts'>";
echo $row['post'];
echo "</br>";
echo "<hr>";
$user_name = mysql_query("SELECT username FROM users WHERE id = '".$row['user']."' ");
$user_name_array = mysql_fetch_array($user_name);
$post_id = $row['id'];
echo "Posted by: <b>";
echo $user_name_array['username'];
echo "</b> | ";
echo "Views: <b>";
echo $row['views'];
echo "</b> | ";
echo "Posted on: ";
echo "<b>";
echo $row['date'];
echo "</b><hr>";
echo '</div>';
if (loggedin()){
if($user_level == 1){
echo "<div class='postoptions'>";
echo "<a href='index.php?post_edit=$post_id'><img src='img/optionicons/edit.png' width='15' height='15' alt='edit' /></a>";
echo "<a href='del_post.php?del=$post_id'><img src='img/optionicons/cancel.png' width='15' height='15' alt='Delete' /></a>";
echo "</div>";
} else {
echo "";
}
}
}
}
?>

Answer 1

SELECT * FROM table_name LIMIT N, M
Where N - number of limited rows and M(offset) = N * (PAGE -1)

Answer 2

You should use the LIMIT clause in your MySQL query, see the docs
in order to calculate the numbe rof pages, you also need the total number of rows, this can be found using SQL_CALC_FOUND_ROWS, see the docs or this question