how to insert advertisement code into wordpress post - wordpress

Question

I want to insert advertisement code into WordPress post(detail page) after or before first paragraph. like this post is there any plugin or any idea..

Answer 1

You can try the plugin Ad Inserter.
Or use the example from this WPBeginner tutorial:
<?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 );
}

Answer 2

Here is the code for showing ad randomly inside WordPress post content-
//Insert ads between first and fourth paragraph of single post content to show it randomly between first and second paragraph.
add_filter( 'the_content', 'prefix_insert_post_ads' );
function prefix_insert_post_ads( $content ) {
// Add code for mobile
$ad_code_mobile = 'AD CODE FOR MOBILE';
// Add code for PC
$ad_code_pc = 'AD CODE FOR PC/DESKTOP/LAPTOP';
if ( is_single() && ! is_admin() ) {
if (!wp_is_mobile()) {
$randnumpc = mt_rand(1,4);
return prefix_insert_after_paragraph( $ad_code_pc, $randnumpc, $content );
}
else {
$randnummobi = mt_rand(1,4);
return prefix_insert_after_paragraph( $ad_code_mobile, $randnummobi, $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 );
}
That code will show ad randomly within paragraph number 1 and 4. You can place this code at the end of your functions.php of your theme or you can create a separate plugin for this purpose.
Source: https://www.eyeswift.com/random-ad-code-in-wordpress-post-content-without-plugin/