如果想在 WordPress 文章段落后添加自定义内容,比如在文章第二段后添加广告,可以尝试用下面的代码:
section
// 在文章第二段之后插入内容
add_filter( 'the_content', 'prefix_insert_post_ads' );
function prefix_insert_post_ads( $content ) {
$ad_code = '<div>添加的文字</div>';
if ( is_single() && ! is_admin() ) {
return prefix_insert_after_paragraph( $ad_code, 2, $content );
}
return $content;
}
// 主要函数
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 );
}
section
分别在段落 2、4、6 后面添加不同的内容
add_filter( 'the_content', 'add_ads_to_content' );
function add_ads_to_content( $content ) {
$ads = array(
2 => 'ad code 1', // paragraph_id => ad_code
4 => 'ad code 2', // paragraph_id => ad_code
6 => 'ad code 3' // paragraph_id => ad_code
);
if ( is_single() && ! is_admin() ) {
foreach ($ads as $paragraph_id => $ad_code) {
$content = prefix_insert_after_paragraph( $ad_code, $paragraph_id, $content );
}
}
return $content;
}
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 );
}
如果只显示在某个分类文章中添加,也可以这么写
add_filter( 'the_content', 'prefix_insert_post_ads' );
function prefix_insert_post_ads( $content ) {
$ad_code = '<div>自定义文字</div>';
if ( is_single() && ! is_admin() && in_category('29') ) {
return prefix_insert_after_paragraph( $ad_code, $content );
}
return $content;
}
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 );
}
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