我有两个脚本来显示符合我条件的相关帖子，但我不知道如何调用它们，请帮助我。我找到了这个代码here.
Related Posts 1:
function get_pew_related_data($args, $post_id, $related_id) {
global $post, $wpdb;
$post_id = intval( $post_id );
if( !$post_id && $post->ID ) {
$post_id = $post->ID;
}
if( !$post_id ) {
return false;
}
$defaults = array(
\'taxonomy\' => \'topics\',
\'post_type\' => array(\'post\'),
\'max\' => 5
);
$options = wp_parse_args( $args, $defaults );
$transient_name = \'pew-related-\' . $options[\'taxonomy\'] . \'-\' . $post_id;
if( isset($_GET[\'flush-related-links\']) && is_user_logged_in() ) {
echo \'<p>Related links flushed! (\' . $transient_name . \')</p>\';
delete_transient( $transient_name );
}
$output = get_transient( $transient_name );
if( $output !== false && !is_preview() ) {
//echo $transient_name . \' read!\';
return $output;
}
$args = array(
\'fields\' => \'ids\',
\'orderby\' => \'count\',
\'order\' => \'ASC\'
);
$orig_terms_set = wp_get_object_terms( $post_id, $options[\'taxonomy\'], $args );
//Make sure each returned term id to be an integer.
$orig_terms_set = array_map(\'intval\', $orig_terms_set);
//Store a copy that we\'ll be reducing by one item for each iteration.
$terms_to_iterate = $orig_terms_set;
$post_args = array(
\'fields\' => \'ids\',
\'post_type\' => $options[\'post_type\'],
\'post__not_in\' => array($post_id),
\'posts_per_page\' => 50
);
$output = array();
while( count( $terms_to_iterate ) > 1 ) {
$post_args[\'tax_query\'] = array(
array(
\'taxonomy\' => $options[\'taxonomy\'],
\'field\' => \'id\',
\'terms\' => $terms_to_iterate,
\'operator\' => \'AND\'
)
);
$posts = get_posts( $post_args );
/*
echo \'<br>\';
echo \'<br>\';
echo $wpdb->last_query;
echo \'<br>\';
echo \'Terms: \' . implode(\', \', $terms_to_iterate);
echo \'<br>\';
echo \'Posts: \';
echo \'<br>\';
print_r( $posts );
echo \'<br>\';
echo \'<br>\';
echo \'<br>\';
*/
foreach( $posts as $id ) {
$id = intval( $id );
if( !in_array( $id, $output) ) {
$output[] = $id;
}
}
array_pop( $terms_to_iterate );
}
$post_args[\'posts_per_page\'] = 10;
$post_args[\'tax_query\'] = array(
array(
\'taxonomy\' => $options[\'taxonomy\'],
\'field\' => \'id\',
\'terms\' => $orig_terms_set
)
);
$posts = get_posts( $post_args );
foreach( $posts as $count => $id ) {
$id = intval( $id );
if( !in_array( $id, $output) ) {
$output[] = $id;
}
if( count($output) > $options[\'max\'] ) {
//We have enough related post IDs now, stop the loop.
break;
}
}
if( !is_preview() ) {
//echo $transient_name . \' set!\';
set_transient( $transient_name, $output, 24 * HOUR_IN_SECONDS );
}
return $output;
}
function pew_related( $args = array(), $post_id = \'\', $related_id = \'\' ) {
$post_ids = get_pew_related_data( $args, $post_id, $related_id );
if( !$post_ids ) {
return false;
}
$defaults = array(
\'post__in\' => $post_ids,
\'orderby\' => \'post__in\',
\'post_type\' => array(\'post\'),
\'posts_per_page\' => min( array(count($post_ids), 10)),
\'related_title\' => \'Related Posts\'
);
$options = wp_parse_args( $args, $defaults );
$related_posts = new WP_Query( $options );
if( $related_posts->have_posts() ):
?>
<h5><?=$options[\'related_title\']?></h5>
<div id="related-material" class="promo">
<?php while ( $related_posts->have_posts() ):
$related_posts->the_post();
?>
<a class="post" href="<?=the_permalink();?>">
<div class="meta">
<?php
$post_project = wp_get_object_terms($related_posts->post->ID, \'projects\');
$project = \'Pew Research Center\';
$project_slug = \'\';
if( isset($post_project[0]) ) {
$project = $post_project[0]->name;
$project_slug = $post_project[0]->slug;
} elseif( $related_posts->post->post_type == \'fact-tank\' ) {
$project = \'Fact Tank\';
$project_slug = \'fact-tank\';
}
?>
<span class="project <?=$project_slug;?> right-seperator"><?=$project;?></span>
<span class="date"><?php the_time(\'M j, Y\'); ?></span>
</div>
<h2><?=the_title();?></h2>
</a>
<?php endwhile;
wp_reset_postdata();
?>
</ol>
</div>
<?php
endif;
}
Related Posts 2:
function exe_get_related_posts_by_common_terms( $post_id, $number_posts = 0, $taxonomy = \'post_tag\', $post_type = \'post\' ) {
global $wpdb;
$post_id = (int) $post_id;
$number_posts = (int) $number_posts;
$limit = $number_posts > 0 ? \' LIMIT \' . $number_posts : \'\';
$related_posts_records = $wpdb->get_results(
$wpdb->prepare(
"SELECT tr.object_id, count( tr.term_taxonomy_id ) AS common_tax_count
FROM {$wpdb->term_relationships} AS tr
INNER JOIN {$wpdb->term_relationships} AS tr2 ON tr.term_taxonomy_id = tr2.term_taxonomy_id
INNER JOIN {$wpdb->term_taxonomy} as tt ON tt.term_taxonomy_id = tr2.term_taxonomy_id
INNER JOIN {$wpdb->posts} as p ON p.ID = tr.object_id
WHERE
tr2.object_id = %d
AND tt.taxonomy = %s
AND p.post_type = %s
GROUP BY tr.object_id
HAVING tr.object_id != %d
ORDER BY common_tax_count DESC" . $limit,
$post_id, $taxonomy, $post_type, $post_id
)
);
if ( count( $related_posts_records ) === 0 )
return false;
$related_posts = array();
foreach( $related_posts_records as $record )
$related_posts[] = array(
\'post_id\' => (int) $record->object_id,
\'common_tax_count\' => $record->common_tax_count
);
return $related_posts;
}
最合适的回答,由SO网友:Antti Koskinen 整理而成
我想你有两个选择如何使用你找到的函数。第一个是将其中一个函数添加到单个post模板文件中。
pew_related(
array(), // add custom parameter key=>value pairs, if needed
get_the_ID(),
\'\' // not sure what is the purpose of the third parameter
);
或
$related_posts = exe_get_related_posts_by_common_terms( get_the_ID(), 3, \'post_tag\', \'post\' );
if ( $related_posts ) {
// foreach loop the $related_posts array for desired html output
}
第二种选择是将其中一个函数挂接到适当的操作或过滤器。例如
// functions.php
add_filter( \'the_content\', function($content){
if ( ! is_singular( \'post\' ) ) {
return $content;
}
ob_start(); // push html output to buffer
pew_related(
array(), // add custom parameter key=>value pairs, if needed
get_the_ID(),
\'\' // not sure what is the purpose of the third parameter
);
$related_html = ob_get_clean(); // get buffer content
return $related_html ? $content . $related_html : $content; // concat html to post content
} );
