Show previous/next only when there is a previous/next page [duplicate] - php

Question

This question already has answers here:
Wordpress: Check if there are previous posts before displaying link
(4 answers)
Closed 5 years ago.
I am trying to get a pagination on the index.php working. What I come up with yet looks something like this:
<nav>
Previous Page
Next Page
</nav>
However, I'd like to show the Previous/Next buttons only, when there actually exists a previous/next page. How can I achieve that?
Thanks!

Answer 1

Put this where you want to display previous/next page
<?php wpbeginner_numeric_posts_nav(); ?>
and in functions.php add
function wpbeginner_numeric_posts_nav() {
if( is_singular() )
return;
global $wp_query;
/** Stop execution if there's only 1 page */
if( $wp_query->max_num_pages <= 1 )
return;
$paged = get_query_var( 'paged' ) ? absint( get_query_var( 'paged' ) ) : 1;
$max = intval( $wp_query->max_num_pages );
/** Add current page to the array */
if ( $paged >= 1 )
$links[] = $paged;
/** Add the pages around the current page to the array */
if ( $paged >= 3 ) {
$links[] = $paged - 1;
$links[] = $paged - 2;
}
if ( ( $paged + 2 ) <= $max ) {
$links[] = $paged + 2;
$links[] = $paged + 1;
}
echo '<div class="navigation"><ul>' . "\n";
/** Previous Post Link */
if ( get_previous_posts_link() )
printf( '<li>%s</li>' . "\n", get_previous_posts_link('<i class="fa fa-angle-left"></i>') );
/** Link to first page, plus ellipses if necessary */
if ( ! in_array( 1, $links ) ) {
$class = 1 == $paged ? ' class="active"' : '';
printf( '<li%s>%s</li>' . "\n", $class, esc_url( get_pagenum_link( 1 ) ), '1' );
if ( ! in_array( 2, $links ) )
echo '<li>…</li>';
}
/** Link to current page, plus 2 pages in either direction if necessary */
sort( $links );
foreach ( (array) $links as $link ) {
$class = $paged == $link ? ' class="active"' : '';
printf( '<li%s>%s</li>' . "\n", $class, esc_url( get_pagenum_link( $link ) ), $link );
}
/** Link to last page, plus ellipses if necessary */
if ( ! in_array( $max, $links ) ) {
if ( ! in_array( $max - 1, $links ) )
echo '<li>…</li>' . "\n";
$class = $paged == $max ? ' class="active"' : '';
printf( '<li%s>%s</li>' . "\n", $class, esc_url( get_pagenum_link( $max ) ), $max );
}
/** Next Post Link */
if ( get_next_posts_link() )
printf( '<li>%s</li>' . "\n", get_next_posts_link('<i class="fa fa-angle-right"></i>') );
echo '</ul></div>' . "\n";
}
Source: WPBegginer