Inserting Images or Text After H2 Tags in WordPress

Introducing how to insert images or text immediately after H2 tags in WordPress. You can insert different images for each category and various other extensions are possible, so please master it.

Benefits

The reason I’m doing this is that I have a hypothesis about SEO: “how much scrolling occurred”. I think it definitely exists, and I also think it’s a fairly large proportion.

Also, user dwell time is said to be important. This is well known.

Scrolling means the dwell time extends by that amount. Looking at ads, looking at images - these split-second times are important.

How much is it designed to not let users go - this is the key point.

Regular Expression Replacement in PHP

To do regular expression replacement in PHP, I think executing the following code would be quick.

<?php
$string = 'aaa</h2>aaa';
$pattern = '/(<\/h2>)/i';
$replacement = '$1aiu';

  $return .= preg_replace($pattern, $replacement, $string) ;

  echo $return;

In WordPress, we replace the entire body text, so change $string = 'aaa</h2>aaa'; to $string = $the_content;. That’s the only difference.

This was my first time writing regular expressions in PHP, but regular expression replacement is a bit harder to write compared to Ruby. Ruby can be written concisely with grep.

Test in WordPress

Write the following code in function.php and update the site.

function category_1_1($the_content) {
    if (is_single() && in_category(array('ゲーム'))) {

      $string = $the_content;
      $pattern = '/(<\/h2>)/i';
      $replacement = '$1aiu';

        $return .= preg_replace($pattern, $replacement, $string) ;

        return $return;

    } else {
        return $the_content;
    }
}

add_filter('the_content','category_1_1');

Now the string “aiu” should be added after H2 in articles in the “ゲーム” (Game) category.