在 WordPress 帖子中间添加自定义内容

Question

我将如何更改此代码，以便它在给定帖子的一半段落之后插入自定义内容？如果帖子有 12 段，则应将内容插入到第 6 段之后。如果帖子有 100 段，则应将内容插入到第 50 段之后。

我在网上找到了这段代码，您可以在其中指定硬编码的段落数：

<?php
//Insert ads after second paragraph of single post content.
add_filter( 'the_content', 'prefix_insert_post_ads' );
function prefix_insert_post_ads( $content ) {
 $ad_code = '<div>Ads code goes here</div>';
 if ( is_single() && ! is_admin() ) {
 return prefix_insert_after_paragraph( $ad_code, 2, $content );
 }
return $content;
}

// Parent Function that makes the magic happen
function prefix_insert_after_paragraph( $insertion, $paragraph_id, $content ) {
 $closing_p = '</p>';
 $paragraphs = explode( $closing_p, $content );
 foreach ($paragraphs as $index => $paragraph) {
 if ( trim( $paragraph ) ) {
 $paragraphs[$index] .= $closing_p;
 }
 if ( $paragraph_id == $index + 1 ) {
 $paragraphs[$index] .= $insertion;
 }
 }

 return implode( '', $paragraphs );
}

我不知道足够的 PHP 使其动态化。我在其他地方没有找到对此问题的动态答案。

Answer 1

我是这样解决的：

//Insert ads after half of the paragraphs in a post
add_filter( 'the_content', 'prefix_insert_post_ads' );
function prefix_insert_post_ads( $content ) {
 $ad_code = '<div>CODE HERE</div>';
 if ( is_single() && ! is_admin() && in_category('29') ) {
 return prefix_insert_after_paragraph( $ad_code, $content );
 }
return $content;
}

// Parent Function that makes the magic happen
function prefix_insert_after_paragraph( $insertion, $content ) {
 $closing_p = '</p>';
 $paragraphs = explode( $closing_p, $content );
 $paragraph_id = round(count($paragraphs) / 2);
 foreach ($paragraphs as $index => $paragraph) {
 if ( trim( $paragraph ) ) {
 $paragraphs[$index] .= $closing_p;
 }
 if ( $paragraph_id == $index + 1 ) {
 $paragraphs[$index] .= $insertion;
 }
 }
 return implode( '', $paragraphs );
}

这里我还添加了类别检查。