我正在搜索中使用此代码。php模板要显示搜索结果，帖子的格式会根据帖子的词条使用不同的模板部分。这种方法对索引非常有效。php，但我很难让它在搜索中发挥作用。php模板。它可以显示帖子，但会显示Invalid argument supplied for foreach() 线路警告foreach( $terms as $term ) {
有什么想法吗？谢谢
<div class="container">
<div class="gutter-sizer"></div>
<?php
$paged = (get_query_var(\'paged\')) ? get_query_var(\'paged\') : 1;
global $query_string;
$query_args = explode("&", $query_string);
$search_query = array();
foreach($query_args as $key => $string) {
$query_split = explode("=", $string);
$search_query[$query_split[0]] = urldecode($query_split[1]);
}
$search_query[\'post_type\'] = \'interpreted\'; // your custom post type
$the_query = new WP_Query($search_query); ?>
<?php if ( $the_query->have_posts() ) : ?>
<div id="isotope-list">
<?php while ( $the_query->have_posts() ) : $the_query->the_post();
$termsArray = get_the_terms( $post->ID, "type" ); //Get the terms for this particular item
$termsString = ""; //initialize the string that will contain the terms
foreach ( $termsArray as $term ) { // for each term
$termsString .= $term->slug.\' \'; //create a string that has all the slugs
}
?>
<div class="<?php echo $termsString; ?> item interpreted"> <?php // \'item\' is used as an identifier (see Setp 5, line 6) ?>
<?php
$terms = get_the_terms( $post->id, \'type\', array( \'parent\' => 0 ) );
$terms_slugs = array();
foreach( $terms as $term ) {
$terms_slugs[] = $term->slug;
}
if( !empty($terms_slugs) ) :
get_template_part( \'blocks/block\', array_pop($terms_slugs) );
else : endif;
?>
</div> <!-- end item -->
<?php endwhile; ?>
</div> <!-- end isotope-list -->
</div> <!-- end container -->
<?php cambridgerules_paging_nav(); ?>
<?php else : ?>
<?php get_template_part( \'content\', \'none\' ); ?>
<?php endif; ?>
最合适的回答,由SO网友:TheDeadMedic 整理而成
因为get_the_terms 不会始终返回数组；会的false 如果该职位没有条款，或WP_Error 如果分类不存在-在循环之前始终检查结果是否正常：
$terms_slugs = array();
$terms = get_the_terms( $post->id, \'type\', /* Note: get_the_terms does not take a 3rd argument ==> */ array( \'parent\' => 0 ) );
if ( is_array( $terms ) ) {
foreach ( $terms as $term ) {
$terms_slugs[] = $term->slug;
}
}
更好的是，在这种情况下，您可以使用awesome helper
wp_list_pluck():
if ( is_array( $terms = get_the_terms( $post->ID, \'type\' ) ) )
$terms_slugs = wp_list_pluck( $terms, \'slug\' );
else
$terms_slugs = array();
