ansaurus

Question

Answer 1

+1 A:

Something like this:

<html> 
<head>

<title>blog</title> 
</head> 
<body> 

<?php 
$POSTS_PER_PAGE = 10;

//Not sure what this is for, but I left it?
$mode = 0;
if ($mode == 0) { $opFile = "blogfile.txt"; } 

//Explode the textfile into lines
$lines = file($opFile); 

$posts = array();
foreach($lines as $line) {
    //Ignore blank lines
    if($line != "") {
        //Explode each non-empty line
        $post = explode("|", $line);

        //Store the blog post
        array_push($posts, $post)
    }
}

//Output the pagination links
echo "<div class=\"blog-pagination\">";
for($i = 1; $i < ceil(count($posts) / $POSTS_PER_PAGE; $i++) {
    echo '<a href="http://mydomain/blog.php?page=' + $i + '">' + $i + '</a>&nbsp;';
}
echo "</div>";

//Assume the user wants the first page if it's not specified
if(!isset($_GET['page'])) {
    $_GET['page'] = 1;
}

//Figure out the first and last posts on this page
$first_post = ($_GET['page'] - 1) * $POSTS_PER_PAGE;
$last_post = $_GET['page'] * $POSTS_PER_PAGE - 1;

//Display the requested posts
for($i = $first_post; $i <= $last_post; $i++) {
    echo "<div class=\"blog-post\">";
    echo "<p class=\"blog-title\">".$blog[1]."</p>";         
    echo "<p class=\"blog-message\">".$blog[2]."</p>"; 
    echo "<p class=\"blog-date\">Posted: " .$blog[0]."</p>";
    echo "<div style=\"clear: both;\"></div>";
    echo "</div>";
}
?>

(This is completely untested, but hopefully you can take it from here!)

Dolph 2010-02-17 21:45:38

Ok, you redeemed your self. Thanks for the help, sorry for calling you arrogant ;) I wil try this out in a little bit and see how it goes. Thanks again!

mark 2010-02-17 21:49:14

No problem, check back with progress/questions!

Dolph 2010-02-17 21:50:22

(Updated my code above) Check out the file() function to read a file to an array: http://php.net/manual/en/function.file.php If you're using PHP5, you can add the flags: (FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) to eliminate some more code

Dolph 2010-02-17 21:53:15

Thanks, but the code does not seem to work.

mark 2010-02-19 16:03:28

Answer 2

+1 A:

This worked in my tests:

define('MAX_PER_PAGE',10);
// sanity checks for per-page and page index
$numPosts = ctype_digit((string)$_GET['perpage']) ? $_GET['perpage'] : 5;
$ostart = $start = max(1, ctype_digit((string)$_GET['page']) ? $_GET['page'] : 1) - 1;

$mode = 0; 
if ($mode == 0) { 
    $file = "blogfile.txt";
}

// read the file into an array, strip newlines and ignore empty lines
file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES | FILE_TEXT);

// sort array (see custom function at bottom)
usort($line, 'blogsort');

$lines = count($line);

// get total number of pages
$numPages = ceil($lines / $numPosts);

// additional sanity checks (also sets $ostart if it was invalid; used later)
$numPosts = min(MAX_PER_PAGE, max(1, $numPosts));
if ($start * $numPosts > $lines ) {
    $ostart = $start = max(0, $lines - $numPosts);
}
else {
    $start *= $numPosts;
}

// Only grab the part of the array we need
$sliced = array_slice($line, $start, $numPosts);

// loop through posts, but break early if we run out
for ($n = 0; $n < $numPosts && isset($sliced[$n]); $n++ ) {
    $blog = explode("|", $sliced[$n]); 

    if (isset($blog[0])) {     
        echo "<div class=\"blog-post\">\n",
             "<p class=\"blog-title\">{$blog[1]}</p>\n",
             "<p class=\"blog-message\">{$blog[2]}</p>\n",
             "<p class=\"blog-date\">Posted: {$blog[0]}</p>\n",
             "<div style=\"clear: both;\"></div>\n",
             "</div>\n\n";

    }
}
// back link
if ($ostart > 0) {
    echo "<a href=\"{$_SERVER['SCRIPT_NAME']}?perpage={$numPosts}&page={$ostart}\">&larr; Older</a>";
}
else {
    echo "None Older";
}
echo " || ";
// forward link
if ($ostart + 1 < $numPages) {
    $next = $ostart + 2;
    echo "<a href=\"{$_SERVER['SCRIPT_NAME']}?perpage={$numPosts}&page={$next}\">Newer &rarr;</a>";
}
else {
    echo "None Newer";
}

function blogsort($a, $b) {
    $dateA = strtotime(substr($a, 0, strpos($a, '|')));
    $dateB = strtotime(substr($b, 0, strpos($b, '|')));

    if ($dateA == $dateB) {
        return 0;
    }
    elseif ($dateA > $dateB) {
        return -1;
    }
    else {
        return 1;
    }
}

Dereleased 2010-02-17 22:01:43

thanks so much, this is great, but if there is 7 entries, it will only show 5. also, how do i make it sort with the newest being on top?

mark 2010-02-18 15:13:46

what i mean is, there will not be a link to the next set unless there is 5 more posts. ideally, there would be a link even if there is just one more post.

mark 2010-02-18 15:22:00

Fixed (hopefully).

Dereleased 2010-02-20 07:58:46

I also updated the script to sort blog entires by date and display the newest first.

Dereleased 2010-02-20 08:08:03

I have updated the script again to take Dolph's idea and use the `file()` function, as it will be faster and better than anything we could implement directly in PHP. Along with the sorting and the last-page fix, I hope this does exactly what you're looking for =)

Dereleased 2010-02-22 22:52:57

Answer 3

A:

Sorry for posting here instead of comments, I didn't have an account when I first posted the question and now im on another computer so I cant login as same. Anyway...

@Dereleased:

Thank you very much, that works perfect, just one final question: how can I get it to sort in reverse. (Newest first, oldest last)?

markf 2010-02-18 00:57:58

See my changes to my existing answer, that should solve the sorting question as well (custom sort function);

Dereleased 2010-02-20 08:08:51

ansaurus

tags:

views:

answers:

Paginate text file with PHP

related questions