Display "NEW" image based on timestamp of post in Wordpress - wordpress

Question

I want to display an image "NEW" next to my post if:
It was published between 1 to 45 days ago.
Hide/disable the "NEW" image after 45 days.
Here's my code for my carousel which displays the latest 4 posts:
`<!------Begin Carousel Cusomizations-------->
<div class="list_carousel">
<a id="prev2" class="prev" href="#"><</a>
<ul id="foo2">
<?php
global $post;
$args = array( 'numberposts' => -1, 'post_type' => 'guides');
$posts = get_posts($args);
foreach( $posts as $post ) : setup_postdata($post); ?>
<li class="productCarousel" onclick="document.location.href='<?php echo the_permalink(); ?>';">
<div class="liContent">
<div class="ribbon"><div class="ribbon-new">New</div></div>
<div class="liPadding">
<?php the_post_thumbnail( array(75,75) ); ?>
<h4><?php the_title(); ?></h4>
<p><?php the_excerpt(); ?></p>
<p class="accessGuides">Access Guide</p>
</div>
</div>
</li>
<?php endforeach; ?>
</ul>
<a id="next2" class="next" href="#">></a>
<div class="clearfix"></div>
<div id="pager2" class="pager"></div>
</div>
</div>
<!----End Carousel Customizations----->`
The DIV section: <div class="ribbon"><div class="ribbon-new">New</div></div> is the container for my "NEW" image banner.
Any assistance is greatly appreciated!

Answer 1

<?php
// Create a new filtering function that will add our where clause to the query
function filter_where( $where = '' ) {
// posts in the last 45 days
$where .= " AND post_date > '" . date('Y-m-d', strtotime('-45 days')) . "'";
return $where;
}
?>
<!------Begin Carousel Cusomizations-------->
<div class="list_carousel">
<a id="prev2" class="prev" href="#"><</a>
<ul id="foo2">
<?php
global $post;
$args = array( 'numberposts' => -1, 'post_type' => 'guides');
add_filter( 'posts_where', 'filter_where' );
$posts = get_posts($args);
foreach( $posts as $post ) : setup_postdata($post); ?>
<li class="productCarousel" onclick="document.location.href='<?php echo the_permalink(); ?>';">
<div class="liContent">
<div class="ribbon"><div class="ribbon-new">New</div></div>
<div class="liPadding">
<?php the_post_thumbnail( array(75,75) ); ?>
<h4><?php the_title(); ?></h4>
<p><?php the_excerpt(); ?></p>
<p class="accessGuides">Access Guide</p>
</div>
</div>
</li>
<?php endforeach;
remove_filter( 'posts_where', 'filter_where' );
?>
</ul>
<a id="next2" class="next" href="#">></a>
<div class="clearfix"></div>
<div id="pager2" class="pager"></div>
</div>
<!----End Carousel Customizations----->`
Updated answer to display the text "New Ribbon" when the post is published in last 45 days
<!------Begin Carousel Cusomizations-------->
<div class="list_carousel">
<a id="prev2" class="prev" href="#"><</a>
<ul id="foo2">
<?php
global $post;
$args = array( 'numberposts' => -1, 'post_type' => 'guides');
$posts = get_posts($args);
foreach( $posts as $post ) : setup_postdata($post); ?>
<li class="productCarousel" onclick="document.location.href='<?php echo the_permalink(); ?>';">
<div class="liContent">
<?php if( strtotime('-45 days') < strtotime( $post->post_date ) ) {
<div class="ribbon">
<div class="ribbon-new">New</div>
</div>
<?php } ?>
<div class="liPadding">
<?php the_post_thumbnail( array(75,75) ); ?>
<h4><?php the_title(); ?></h4>
<p><?php the_excerpt(); ?></p>
<p class="accessGuides">Access Guide</p>
</div>
</div>
</li>
<?php endforeach; ?>
</ul>
<a id="next2" class="next" href="#">></a>
<div class="clearfix"></div>
<div id="pager2" class="pager"></div>
</div>
<!----End Carousel Customizations----->