how to get next/previous post hrefs and titles in wordpress

It's about the view of a single post. I'm trying to set the links for previous and next blogposts like this way:

<a class="prevpost" href="linktoprevpost" title="prev post's title"> </a>
<a class="nextpost" href="linktonextpost" title="next post's title"> </a>

where both links get an image as background by using display: block and specified width and height. The titles of the linked posts should be accessible via the title-attribute of the a-tags, so that users can see them by hovering.<br />
I also want to restrict the linked posts on the current category. So I need to find a way to get

1. an a-tag with the href of the previous/next post
2. which is in the same category as the one currently viewed
3. without inner text because of the backgroundimage
4. with the previous/next post name in title-attribute
5. with a custom css-class

<br />
The category matching needs to be only the first level because I divided my page into 3 main categories. I'm using

$a = get_the_category(get_the_ID());
$cat = $a[0]->name;
for getting the first category's name and setting it as additional body-class in header.php. Maybe I could reuse that?
<br /><br />
I also found out that using previous_post_link() and next_post_link() like this way

next_post_link('%link', '', TRUE);

gives me the posts of the same category without inner content, so 1 & 2 & 3 would be solved. But it seems, to get 4 & 5 too I'll need another way.<br /><br />

Using Wordpress Version 3.4.1.

<?
echo '<a href="'.get_permalink( get_the_ID()-1 ).'" title="'.get_the_title( get_the_ID()-1 ).'">Previous</a>';
echo '<a href="'.get_permalink( get_the_ID()+1 ).'" title="'.get_the_title( get_the_ID()-1 ).'">Next</a>';

?>

Got it.

Now this is my code:

$p = get_adjacent_post(1, '', 1);
if(!empty($p)) echo '<a class="prevpost" href="'.$p->guid.'" title="'.$p->post_title.'">&nbsp</a>';
$n = get_adjacent_post(1, '', 0);
if(!empty($n)) echo '<a class="nextpost" href="'.$n->guid.'" title="'.$n->post_title.'">&nbsp</a>';

The function returns an object of the prev/next post which I can use for generating my links. The first parameter is for restricting the post on the same cat.<br />
I searched in wordpress codex a few times yesterday but didn't come across this function, now stumled upon it by accident.<br />
<br />
If someone has a better/simpler/faster method please post to get an accepted answer.

No need for functions and filters all you need to do is to use `get_adjacent_post` instead of `next_post_link ` and `prev_post_link`, Note that `get_adjacent_post` is used to get previous and next post, you can read about it [here][1]
To get previous post and it's title attribute use this

$prev_post = get_adjacent_post(false, '', true);
if(!empty($prev_post)) {
echo '<a href="' . get_permalink($prev_post->ID) . '" title="' . $prev_post->post_title . '">' . $prev_post->post_title . '</a>'; }
To get next post and it's title attribute use this

$next_post = get_adjacent_post(false, '', false);
if(!empty($next_post)) {
echo '<a href="' . get_permalink($next_post->ID) . '" title="' . $next_post->post_title . '">' . $next_post->post_title . '</a>'; }

[1]:

[To see links please register here]

step 1 : you just need to add this function below in function.php

```
// its to ssolve single page next and previous liinks
# get_adjacent_post( $in_same_cat = false, $excluded_categories = '', $previous = true )
function echo_next_previous_post_link($fmg_name="link" ,$selector="next")
{

if ($selector=="next") {
$next_post_obj = get_adjacent_post( '', '', false );
$next_post_ID = isset( $next_post_obj->ID ) ? $next_post_obj->ID : '';
$next_post_link = get_permalink( $next_post_ID );
$next_post_title = get_the_title($next_post_ID);
if ($fmg_name=="link") {
echo $next_post_link ;
}
else {
echo $next_post_title ;
}
}
else {
$previous_post_obj = get_adjacent_post( '', '', true );
$previous_post_ID = isset( $previous_post_obj->ID ) ? $previous_post_obj->ID : '';
$previous_post_link = get_permalink( $previous_post_ID );
$previous_post_title = get_the_title($previous_post_ID);
if ($fmg_name=="link") {
echo $previous_post_link ;
}
else {
echo $previous_post_title ;
}
}

}
```

Step 2 : now you can print post url and title in any page you want
```
<a href="<?php echo_next_previous_post_link("link","next"); ?>"><?php echo_next_previous_post_link("title","next"); ?></a>

<a href="<?php echo_next_previous_post_link("link","previous"); ?>"><?php echo_next_previous_post_link("title","previous"); ?></a>
```

The previous code didn't work for me.
I came to the following

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-html -->

<?php
$prev = get_adjacent_post(true,'',true);
$next = get_adjacent_post(true,'',false);
?>

<div>
<a href="<?php echo get_permalink($prev->ID);?>">Previous</a>
<p><?php echo get_the_title($prev->ID );?></p>
</div>

<div>
<a href="<?php echo get_permalink($next->ID);?>">Next</a>
<p><?php echo get_the_title($next->ID );?></p>
</div>

<!-- end snippet -->