Reverse text file output

[homer09001]

2 questions:

1, How do i go about reversing the output from a textfile, im already using Fopen to read a flat file line by line, then using explode to separate the data peices

2, how do i paginate the above?

[djjjozsi]

use file() to read the whole file contents as an array,

once you have the lines in an array, with a simple for cycle
you can make it visible.
pager?
once you have the whole file in an array, you can get its values with a for cycle. And make links with start and block positions.

[rincewind456]

1. [man]strrev()[/man], reverses strings.

2. paginate what?

[homer09001]

rincewind456;10929022 wrote:

1. [man]strrev()[/man], reverses strings.

2. paginate what?

1, Not litteraly reverse it letter by letter, reverse the order they are displayed first entries last, and last entries first.

2, paginate the comments, obviously i don't want 2-300 comments on one page.

[djjjozsi]

why don't you store these comments in database?

[rincewind456]

NOT tested but something like this:

<?php

/*

READ ALL THE COMMENTS INTO AN ARRAY CALLED $items
AND DO A COUNT ON THE ARRAY AND CALL IT $count



*/
#Set number of images per page
$items_per_page = 10;

#Calculate number of pages for links
$pages = floor($count/$items_per_page);
$last_page = $count % $items_per_page;
#Construct page links
$page_links = '';	#Initialize variable
for ($i=0;$i <=$pages;$i++){
	$page_links .= '<a href="page.php?p='.($i+1).'">'.($i+1).'</a>'."\n";	#Change page.php to your required page name

}

#Check to see if page chosen
if(isset($_GET['p'])){

$page_number = (int) $_GET['p'];
}
#set default page number to display the first batch of images
else
{
	$page_number =1;
}

#Calculate which images to display
$diff = $page_number*$items_per_page;
$first_item = $diff-($items_per_page-1);
$last_item = $diff;
$display_items ='';

if ($last_item> $count) {
	$last_item = $count-1;
}
for ($i =$last_item;$i <= $first_item-1;$i--){
	$display_items .= '<p>'.$item[$i]."<p>\n<br />";
}

print $display_items;	# Display the image code

print '<div style="text-align:center;">'.$page_links.'</div>';	#Display the page links code

?>

[homer09001]

Because the idea is that it is a Flat File Guestbook, its much easier to set up than a database for those who aren't as savy when it comes to using PHP.

I may consider a MYSQL Version as a later release

[djjjozsi]

one suggestion to the posted code, you should use htmlspecialchars on the printed comments to protect your program from user injected scripts.

[homer09001]

djjjozsi;10929029 wrote:

one suggestion to the posted code, you should use htmlspecialchars on the printed comments to protect your program from user injected scripts.

I shall include htmlspecialchars in the 1.1 update which I am working on for the 1st October.

Any other suggestion on security etc would be greatly appreciated.

[Weedpacket]

homer09001 wrote:

Because the idea is that it is a Flat File Guestbook, its much easier to set up than a database for those who aren't as savy when it comes to using PHP.

I may consider a MYSQL Version as a later release

Then you may want to consider [man]SQLite[/man] if you want flat file storage.