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Drupal – Add Previous and Next Links for Node Navigation

August 4, 2011 ykyuen 31 Comments

When you are viewing a node, it would be nice to have the previous and next navigation buttons so that you can browse other nodes of the same content type more easily. This is exactly the recent task i need to complete. Luckily i found a very good post showing how to add the navigation buttons in just 2 steps.

1. Add the following function in your theme template.php

function <theme>_prev_next($current_node = NULL, $op = 'p') {
  // Node types to include in paging
  $node_types = array('blog');

  if ($op == 'p') {
    $sql_op = '<';
    $order = 'DESC';
  }
  elseif ($op == 'n') {
    $sql_op = '>';
    $order = 'ASC';
  }
  else {
    return NULL;
  }

  $output = NULL;
  foreach($node_types as $type) {
    $quoted_types[] = "'" . $type . "'";
  }
  $sql = "SELECT nid, title, created FROM {node} n
    WHERE created $sql_op %s
    AND type IN (" . implode(',', $quoted_types) . ")
    AND status = 1
    ORDER BY created $order
    LIMIT 1";
  $result = db_query($sql, $current_node->created, $type);
  $data = db_fetch_object($result);
  if (!isset($data->nid) || !$data->nid) {
    return NULL;
  }
  return l($data->title, "node/$data->nid", array('html' => TRUE));
}

2. Add the following piece of code to node.tpl.php or node-<content-type>.tpl.php

<!-- Node paging start. Add this to your node.tpl.php and/or node-TYPE.tpl.php -->
<?php if (!$teaser) : ?>
  <div class="navpn">
    <div class="pnlaquo">&laquo;</div>
    <div id="pnprev"> <?php print <theme>_prev_next($node, 'p'); ?> </div>
    <div id="pnmain"> | <a href="<?php print base_path(); ?>">Home</a> | </div>
    <div id="pnnext"> <?php print <theme>_prev_next($node, 'n'); ?> </div>
    <div class="pnraquo">&raquo;</div>
  </div>
<?php endif; ?>
<!-- Node paging end -->

The navigation buttons should work now. Wait… i am using Panels for my node view which contains some Views content panes. How could i load the navigation buttons in views?

That’s easy, in your view, probably you will take the node id as argument to show the content of a specific node and the second argument of the URL will be the node id. Let’s change the code above as follow and paste it in the view template file.

<?php $blog= node_load(arg(1)); ?>
<div class="navpn">
  <div id="pnprev"> <?php print <theme>_prev_next($blog, 'p'); ?> </div>
  <div id="pnmain"> | <a href="<?php print base_path(); ?>">Home</a> | </div>
  <div id="pnnext"> <?php print <theme>_prev_next($blog, 'n'); ?> </div>
</div>

Rescan the template file and the navigation buttons are ready.

Done =)

Reference:

31 thoughts on “Drupal – Add Previous and Next Links for Node Navigation”

ahlofan says:

August 4, 2011 at 16:16

I would be nice if you could combine this feature with nodequeue man!

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1. ykyuen says:
  
  August 4, 2011 at 16:24
  
  haha~ maybe we can create a new module for that =P
  
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JJ says:

August 8, 2011 at 23:01

Hmm. I got this error:

Recoverable fatal error: Argument 2 passed to db_query() must be an array, string given, called in /var/www/vhosts/example.com/httpdocs/sites/all/themes/THEME/template.php on line 147 and defined in db_query() (line 2282 of /var/www/vhosts/example.com/httpdocs/includes/database/database.inc).

Drupal 7.4
Zen Sub-theme

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1. ykyuen says:
  
  August 9, 2011 at 12:20
  
  O, this post only works for Drupal 6, i didn’t try in D7. I think you can try the following module in D7.
  Drupal Module – Flippy
  
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Pingback: Drupal 7 – Display Previous and Next node links on node view using Flippy module | Eureka!

Hi This is really awesome !!! Hey is there anyway to get this to print out different classes for the 2 pager links like something like this

<a href class="prev"><span class="arrowLeft"></span></a>
<a href class="next"><span class="arrowRight"></span></a>

right now they both are identical except for the link to the next node

thanks again

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About the classes, you can refer to the api specification of the l() function. probably passing the $attributes array with class as key.
Drupal API – l()

Or you can customize the return string in function <theme>_prev_next(), sth like

...
// Instead of using the l()
//return l($data->title, "node/$data->nid", array('html' => TRUE));

// You can return the HTML string
if ($op == 'p') {
  return '<a href="node/' . $data->nid . '" class="prev"><span class="arrowLeft"></span></a>';
} else {
  return '<a href="node/' . $data->nid . '" class="next"><span class="arrowRight"></span></a>';
}

About the looping, probably you need to add some logic if the sql returns no record.

  if (!isset($data->nid) || !$data->nid) {
    //return NULL;
    
    // If no node is found, you need to setup a new sql to return the first or latest node depending $op.
  }

Hope this help.

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naeluh says:

May 18, 2013 at 00:42
Hi ,

It totally helps for sure for the markup, it is correct now !

but for some reason its still returning the exact same classes some reason this still returns 2 identical strings – I tried this
```
if ($op = 'p') {
  return '<a>nid . '" class="prev">' . $data->title .'</a>';
}

elseif ($op = 'n') {
  return '<a>nid . '" class="next">' . $data->title .'</a>';
}
```
However the output is always the same
```
<a href="node/129" rel="nofollow">title1</a>       
<a href="node/132" rel="nofollow">title2</a>
```
Is there anyway to get it to have it return a second set of classes ? for the other link?

Thanks very much for your help !! Your awesome !!

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1. ykyuen says:
  
  May 18, 2013 at 00:55
  
  Did u clear the drupal cache after the update?
  
  if u want to paste code, pls follow the Syntax Highlight.
  
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  Reply

Hi ,

Yes I did clear the cache it totally works but the output looks like this
Its basically making the 2 links have identical classes but still different links to nodes

<a href="node/129" class="prev"><span class="arrowLeft">title1</span></a>       
<a href="node/132" class="prev"><span class="arrowLeft">title2</span></a>

Once again thanks for your help

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O, my typo… should be “==”

if ($op == 'p') {
  return '<a href="node/' . $data->nid . '" class="prev"><span class="arrowLeft"></span></a>';
} else {
  return '<a href="node/' . $data->nid . '" class="next"><span class="arrowRight"></span></a>';
}

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naeluh says:

May 18, 2013 at 01:07

awesome totally works !

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1. ykyuen says:
  
  May 18, 2013 at 01:08
  
  you are welcome~ =)
  
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  Reply
naeluh says:

May 18, 2013 at 01:12

now I have to figure out that looping thing haha

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1. ykyuen says:
  
  May 20, 2013 at 18:29
  
  it should be straight forward. let me know if u have any problem. =D
  
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  Reply
  1. naeluh says:
    
    May 21, 2013 at 00:33
    Ok cool I will let you know wif I have any issue thanks – Also do you have any experience with views pager override in template.php well this one specifically
    
    function mytheme_views_mini_pager__myiew($tags = array(), $limit = 10, $element = 0, $parameters = array(), $quantity = 9)
    
    I was trying to a similar thing with this function but instead I was trying to return a slightly different html string
    
    Here is the full function here – http://pastebin.com/n9BNBi8c
    
    The html string I am looking for is this
    
    <div class="articlePagination"> <a href="" class="action"><span>Newer Posts</span></a> <a href="" class="action back"><span>Older Posts</span></a> </div>
    
    I feel like returning this views pager in a more specific html string should be the exact same process but for some reason I cannot get it it seems like the classes of l() are being controlled by the $items array above and I was wondering if you had any experience with this type of pager or if this is a completely different thing.
    
    thanks again for all the help
    
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  2. ykyuen says:
    
    May 23, 2013 at 17:43
    
    Try this
    Drupal Module – Views Simple Pager
    
    LikeLike
naeluh says:

May 23, 2013 at 20:32

Oh hey I am using d6 and I have already got custom pager going
here is my issue here http://drupal.org/node/2001114 thanks again for your help

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1. ykyuen says:
  
  May 30, 2013 at 01:34
  
  Just make a reply on your post. hope that works for you. =)
  
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  Reply

Hi ykyuen,

I was able to figure it out for sure I should post my solution there – Basically I just used a if else statement on my existing views pager.

thanks for the help for sure !

I am still struggling with creating a loop though if you have any pointers for that ?

thanks again for all your help !

function mytheme_prev_next($current_node = NULL, $op = 'p') {
  // Node types to include in paging
  $node_types = array('node_type');

  if ($op == 'p') {
    $sql_op = '<';
    $order = 'DESC';
  }
  elseif ($op == 'n') {
    $sql_op = '>';
    $order = 'ASC';
  }


  $output = NULL;
  foreach($node_types as $type) {
    $quoted_types[] = "'" . $type . "'";
  }
  $sql = "SELECT nid, title, created FROM {node} n
    WHERE created $sql_op %s
    AND type IN (" . implode(',', $quoted_types) .")
    AND status = 1
    ORDER BY created $order
    LIMIT 1";
  $result = db_query($sql, $current_node->created, $type);
  $data = db_fetch_object($result);
  if (!isset($data->nid) || !$data->nid) {
    return NULL;
  }

  // Instead of using the l()
//return l($data->title, "node/$data->nid", array('html' => TRUE));

$newTitle = str_replace(" ", "<br>", $data->title);

// You can return the HTML string
if ($op =='p') {
  return '<a href="node/' . $data->nid . '" class="prev"><span class="arrowLeft">' . $newTitle .'</span></a>';
}
else {
  return '<a href="node/' . $data->nid . '" class="next"><span class="arrowRight">' . $newTitle .'</span></a>';
}

}

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Try this

if (!isset($data->nid) || !$data->nid) {
  $sql = "SELECT nid, title, created FROM {node} n
    WHERE type IN (" . implode(',', $quoted_types) .")
    AND status = 1
    ORDER BY created $order
    LIMIT 1";
  $result = db_query($sql, $current_node->created, $type);
  $data = db_fetch_object($result);
}

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naeluh says:

May 30, 2013 at 02:23

Hi

thanks I will try it out !!

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naeluh says:

May 30, 2013 at 02:29

Wow totally worked thanks !

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1. ykyuen says:
  
  May 30, 2013 at 02:33
  
  great. =)
  
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  Reply
naeluh says:

June 1, 2013 at 06:18

Hey for some reason the code now wont return any results for a certain node type ? Is there any reason for that ?

thanks

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naeluh says:

June 1, 2013 at 06:25

It creates the links but there are no node titles it just will query the database for some reason ?

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naeluh says:

June 1, 2013 at 08:43

I am really not sure what is happening but it still won’t work on this one content type but it works on 3 others for some reason, the only thing I really could get it to do is print a single node from the set when I do return NULL; it prints nothing ?

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1. ykyuen says:
  
  June 4, 2013 at 16:04
```
...
// Node types to include in paging
$node_types = array('node_type');
...
```
  this array stores those content type which are available for the sql query. you could either remove this node type condition in the query or you add your new content type to it.
  
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naeluh says:

June 5, 2013 at 04:52

Hi ykyuen,

Cool yeah I got it figured out it was a published and unpublished thing.

thanks

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1. ykyuen says:
  
  June 6, 2013 at 20:59
  
  good to know that.
  
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  Reply

It’s Work!

function lafam_prev_next($current_node = NULL, $op = 'p') {
  // Node types to include in paging
  $node_types = array('blog');

  if ($op == 'p') {
    $sql_op = '';
    $order = 'ASC';
  }

  $output = NULL;
  foreach($node_types as $type) {
    $quoted_types[] = "'" . $type . "'";
  }

  $sql = "SELECT nid, title, created FROM {node} n
          WHERE created $sql_op :created
          AND type IN (" . implode(',', $quoted_types) .")
          AND status = 1
          ORDER BY created $order
          LIMIT 1";

  $result = db_query($sql, array(':created' =&gt; $current_node-&gt;created));

  foreach ($result as $row) {
    $options = array('absolute' =&gt; TRUE);
    $url = url('node/' . $row-&gt;nid, $options);
  }

  // You can return the HT(ML string
    if ($op == 'p' and isset($url)) {
      return '<a href="' . $url . '" rel="nofollow">
                
                Ver anterior post
              </a>';
    }
    if ($op == 'n' and isset($url)) {
      return '<a href="' . $url . '" rel="nofollow">
                Ver siguiente post
                
              </a>';
    }
}

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Drupal – Add Previous and Next Links for Node Navigation

31 thoughts on “Drupal – Add Previous and Next Links for Node Navigation”

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Dream BIG and go for it =)

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31 thoughts on “Drupal – Add Previous and Next Links for Node Navigation”

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Dream BIG and go for it =)