问题描述
我正在处理自定义帖子类型档案，我想添加一个A-Z过滤菜单。 我设法在这个线程（Create alphabetical Pagination in wordpress）下工作了，但是我不明白我的初始页面（/ exposants）如何显示所有结果。
<div class="exposant__filter" id="exposants">
<a href="/exposants/#exposants"><?PHP _e('Tout','festival'); ?></a>
<?PHP
$posts = get_posts(array(
'numberposts' => -1,'post_type' => 'exposant','orderby' => 'title','order' => 'ASC',));
$firstLetters = array();
foreach($posts as $post) {
$title = $post->post_title;
$startingLetter = substr($title,1);
$dupeFirstLetters[] = $startingLetter;
$firstLetters = array_unique($dupeFirstLetters);
sort($firstLetters);
}
foreach($firstLetters as $letter) {
echo "<a href=\"?lettre=$letter\">$letter</a>";
}
if(!empty($_GET['lettre'])) {
$letter = $_GET['lettre'];
}
else {
$letter = $firstLetters[0];
} ?>
</div>
<?PHP
$exposantsArchive = new WP_Query(array(
'posts_per_page' => -1,)); ?>
<div class="row row--2col u-m-top--8">
<?PHP
while($exposantsArchive->have_posts()) {
$exposantsArchive->the_post();
$first_letter = strtoupper(substr(apply_filters('the_title',$post->post_title),1));
$logo = get_field('logo');
if($first_letter == strtoupper($letter)) { ?>
<div class="exposant__thumb col--padding-right">
<div class="exposant__logo">
<img src="<?PHP echo $logo['url'] ?>" alt="<?PHP echo $logo['alt'] ?>">
</div>
<div class="exposant__thumb-content">
<h2 class="heading--as-h4 heading--no-margin"><?PHP the_title(); ?></h2>
<?PHP
$related = get_field('pieces_liees');
if($related) {
echo '<p class="exposant__categories">';
foreach ($related as $k=>$category) {
if($k) echo '/';
?>
<a href="<?PHP echo get_the_permalink($category); ?>"><?PHP echo get_the_title($category); ?></a>
<?PHP }
}
?></p>
<p class="exposant-thumb__excerpt"><?PHP echo wp_trim_words( get_field('description'),16,'...' ); ?></p>
<a href="<?PHP the_permalink(); ?>" class="btn"><?PHP _e('Plus de détails','festival'); ?></a>
</div>
</div>
<?PHP
}
}
wp_reset_postdata() ?>
</div>
我想我不得不替换else {$ letter = $ firstLetters [0];}，但是我不知道要做什么。
在此先感谢您的宝贵支持。
编辑！
这是最终能完美工作的解决方案！
所以在functions.PHP中
<?PHP
add_filter( 'posts_where','tomtom_posts_where',10,2 );
function tomtom_posts_where( $args,$wp_query_obj )
{
global $wpdb;
$starts_with = $wp_query_obj->get( 'starts_with' );
if ( $starts_with ) {
$args .= ' AND ' . $wpdb->posts . '.post_title LIKE \'' . esc_sql( $wpdb->esc_like( $starts_with ) ) . '%\'';
}
return $args;
}
这是页面
<?PHP
/**
* Outputs an alphabetic paginator.
*
* @return void
*/
function tomtom_output_alphabetic_paginator() {
$posts = get_posts( array(
'numberposts' => -1,'post_type' => 'exposant','orderby' => 'title','order' => 'ASC',) );
$firstLetters = array();
foreach ( $posts as $post ) {
$title = $post->post_title;
$startingLetter = substr( $title,1 );
$dupeFirstLetters[] = $startingLetter;
}
$firstLetters = array_unique( $dupeFirstLetters );
sort( $firstLetters );
echo "<a href=\"/exposants/#exposants\">" . __('Tout','festival') . "</a>";
foreach ( $firstLetters as $letter ) {
echo "<a href=\"?lettre={$letter}#exposants\">{$letter}</a>";
}
}
/**
* Gets an array of exposant custom post types.
*
* @return array
*/
function tomtom_get_exposants() {
$args = array(
'posts_per_page' => -1,);
if ( !empty( $_GET['lettre'] ) ) {
$args['starts_with'] = $_GET['lettre'];
}
$wp_query = new WP_Query( $args );
return $wp_query->get_posts();
}
/**
* Outputs links related to exposant custom post type object.
*
* @return void
*/
function tomtom_output_related( $related ) {
foreach ( $related as $k => $category ) {
if ( $k ) {
echo ' / ';
}
echo "<a href=\"" . get_the_permalink( $category ) . "\">" . get_the_title( $category ) . "</a>";
}
}
?>
<div class="exposant__filter" id="exposants">
<?PHP tomtom_output_alphabetic_paginator(); ?>
</div>
<?PHP $exposantsArchive = tomtom_get_exposants(); ?>
<div class="row row--2col u-m-top--8">
<?PHP foreach ( $exposantsArchive as $exposant ): ?>
<?PHP $logo = get_field('logo',$exposant->ID); ?>
<?PHP $related = get_field('pieces_liees',$exposant->ID); ?>
<?PHP $description = get_field('description',$exposant->ID); ?>
<div class="exposant__thumb col--padding-right">
<div class="exposant__logo">
<img src="<?PHP echo $logo['url'] ?>" alt="<?PHP echo $logo['alt'] ?>">
</div>
<div class="exposant__thumb-content">
<h2 class="heading--as-h4 heading--no-margin"><?PHP echo $exposant->post_title; ?></h2>
<?PHP if ( $related ): ?>
<p class="exposant__categories">
<?PHP tomtom_output_related( $related ); ?>
</p>
<?PHP endif; ?>
<p class="exposant-thumb__excerpt"><?PHP echo wp_trim_words( $description,20,'...' ); ?></p>
<a href="<?PHP get_permalink( $exposant->ID ); ?>" class="btn"><?PHP _e( 'Plus de détails','festival' ); ?></a>
</div>
</div>
<?PHP endforeach; ?>
</div>
解决方法
如果我对问题的理解正确，那么这是您代码的稍微优化的版本。为清楚起见，我已尽可能自由地将您的php和html分离。
未经测试，可能需要进行一些调整，但总的来说，我希望这可以解决问题！
在您的functions.php文件中添加此代码，这将允许您按首字母过滤数据库查询：
add_filter( 'posts_where','tomtom_posts_where',10,2 );
function tomtom_posts_where( $args,$wp_query_obj )
{
global $wpdb;
$starts_with = $wp_query->get( 'starts_with' )
if ( $starts_with ) {
$args .= ' AND ' . $wpdb->posts . '.post_title LIKE \'' . esc_sql( $wpdb->esc_like( $starts_with ) ) . '%\'';
}
return $where;
}
然后：
<?php
/**
* Outputs an alphabetic paginator.
*
* @return void
*/
function tomtom_output_alphabetic_paginator() {
$posts = get_posts( array(
'numberposts' => -1,'post_type' => 'exposant','orderby' => 'title','order' => 'ASC',) );
$firstLetters = array();
foreach ( $posts as $post ) {
$title = $post->post_title;
$startingLetter = substr( $title,1 );
$dupeFirstLetters[] = $startingLetter;
}
$firstLetters = array_unique( $dupeFirstLetters );
sort( $firstLetters );
echo "<a href=\"/exposants/#exposants\">" . __('Tout','festival') . "</a>";
foreach ( $firstLetters as $letter ) {
echo "<a href=\"?lettre={$letter}\">{$letter}</a>";
}
}
/**
* Gets an array of exposant custom post types.
*
* @return array
*/
function tomtom_get_exposants() {
$args = array(
'posts_per_page' => -1,'post_type' => 'exposant','orderby' => 'title','order' => 'ASC',);
if ( ! empty( $_GET['lettre'] ) ) {
$args['starts_with'] = $_GET['lettre'];
}
return new WP_Query( $args );
}
/**
* Adds fields to an exposant custom post type object.
*
* @param WP_Post $exposant Exposant custom post type.
* @return void
*/
function tomtom_hydrate_exposant( &$exposant ) {
$exposant->logo = get_field( 'logo',$exposant->ID );
$exposant->related = get_field( 'pieces_liees',$exposant->ID );
$exposant->description = get_field( 'description',$exposant->ID );
}
/**
* Outputs links related to exposant custom post type object.
*
* @return void
*/
function tomtom_output_related( $exposant ) {
if ( ! isset( $exposant->related ) ) {
tomtom_hydrate_exposant( $exposant );
}
foreach ( $exposant->related as $k => $category ) {
if ( $k ) {
echo '/';
}
echo "<a href=\"" . get_the_permalink( $category ) . "\">" . get_the_title( $category ) . "</a>";
}
}
?>
<div class="exposant__filter" id="exposants">
<?php tomtom_output_alphabetic_paginator(); ?>
</div>
<?php $exposantsArchive = tomtom_get_exposants(); ?>
<div class="row row--2col u-m-top--8">
<?php foreach ( $exposantsArchive as $exposant ): ?>
<?php tomtom_hydrate_exposant( $exposant ); ?>
<div class="exposant__thumb col--padding-right">
<div class="exposant__logo">
<img src="<?php echo $exposant->logo['url'] ?>" alt="<?php echo $exposant->logo['alt'] ?>">
</div>
<div class="exposant__thumb-content">
<h2 class="heading--as-h4 heading--no-margin"><?php echo $exposant->post_title; ?></h2>
<?php if ( $exposant->related ): ?>
<p class="exposant__categories">
<?php tomtom_output_related( $exposant->related ); ?>
</p>
<?php endif; ?>
<p class="exposant-thumb__excerpt"><?php echo wp_trim_words( $exposant->description,16,'...' ); ?></p>
<a href="<?php get_permalink( $exposant->ID ); ?>" class="btn"><?php _e( 'Plus de détails','festival' ); ?></a>
</div>
</div>
<?php endforeach; ?>
</div>