Insert Content in WordPress after a certain amount of characters or words

Name: Hire Jordan Smith
Address: 406 S Boulder Ave #660E, Tulsa, OK, 74103, United States
Telephone: 912-656-6434
Price range: $$$

Need a simple way to add content to a post or page after a certain amount of characters or words? Check this snippet out!

+<?php
+add_filter('the_content', 'hjs_insert_content_after_chars_words');
+function hjs_insert_content_after_chars_words($content) {
+  // only do this if post is longer than 1000 characters
+  $enable_length = 1500;
+  // insert after the first </p> after 500 characters
+  $after_character = 1500;
+  if (is_single() && strlen($content) > $enable_length) {
+    $before_content = substr($content, 0, $after_character);
+    $after_content = substr($content, $after_character);
+    $after_content = explode('</p>', $after_content);
+    $text = 'Add Content Here';
+    array_splice($after_content, 1, 0, $text);
+    $after_content = implode('</p>', $after_content);
+    return $before_content . $after_content;
+  }
+  else {
+    return $content;
+  }
+}