Code not working, Sorting MySQL results into pages - php

Question

Ok so iv got this code which is suppose to bring back all my results from my database and display 5 results per page. At the moment I have 12 results in my database and it is only showing 10, it wont show the 3rd page as there isnt 5 results to display. Here is my code
//$_GET['page'] is to get the current page opened
if (isset($_GET["page"])) { $page = $_GET["page"]; } else { $page=1; };
$results_per_page = "5"; //number of results I want displayed per page
$start_from = ($page-1) * $results_per_page;
$query = "SELECT * FROM items WHERE subcat = '$conditions' LIMIT $start_from, $results_per_page";
$result = mysql_query($query) or die("Unable to verify user because : " . mysql_error());
while ($row_condition=mysql_fetch_array($result)) {
//Display the results here
}
//Count number of results from database and work out how
//many pages I need to display all the results.
$result1 = mysql_query("SELECT * FROM items WHERE subcat = '$conditions'");
$num_rows = mysql_num_rows($result1);
$num_pages = $num_rows / $results_per_page;
if ($num_rows > $results_per_page){
?>
<div id="pagenum">
<?php
//This creates and displays the page numbers for the user to select
foreach( range( 1, $num_pages) as $i) {
if ($thepage == $i){
echo '<b>' . $i . '</b>';
}else{
echo '' . $i . '';
}
//This places a line between each number of pages
if ($i == $num_pages){
}else{
echo " | ";
}
}
?>
</div>
<?php
}else{ echo "Test";}
?>
So can anyone see a problem with this?, so I have 12 entries in my database. However im only getting 2 pages, 5 on each page and im not getting the 3rd page as there are only 2 results left and it seems to want 5 to finish it.
Thanks

Answer 1

You need to use ceil function:
$num_pages = ceil($num_rows / $results_per_page);

Answer 2

I think your biggest problem is that PHP will make give you a float when you divide two numbers that don't result in a whole one.
$one = 12;
$two = 5;
$result = $one / $two; // That will result in 2.4
Now, the issue is you, technically, have three pages, but PHP will NOT treat the .4 pages as a page, so when you loop through it will technically only do it twice. Since your using range and it's 2.4, it seems like PHP is rounding down. I would suggest something like this:
$result1 = mysql_query("SELECT * FROM items WHERE subcat = '$conditions'");
$num_rows = mysql_num_rows($result1);
$num_pages = ceil($num_rows / $results_per_page);
if ($num_rows > $results_per_page){
for($i = 0; $i < $num_pages; $i++) {
ceil() will force that division to round up every time, which will always give you that extra page.
Give it a shot! Let me know if it fixes your issue!