function to highlight search terms in search.php

site/public/search.php

 # @purpose: Searches the Solr index
 
 include '../solr.php';
+include '../text_functions.php';
 
 ?>
 
 
       foreach($search_results as $result):
 
+          $result = highlight_search_terms($result, $_POST["search"]);
 ?>
           Application ID:
 
 ?>
 
   </div>
+  <script>
+    let text = "<?php echo $_POST["search"]; ?>";
+    upperText = text.toUpperCase();
+    result = "<span style='color:green'>" + upperText + "</span>";
+    const collection = document.getElementsByClassName("search_term");
+    for (let i = 0; i < collection.length; i++) {
+      collection[i].innerHTML = result;
+    }
+  </script>
 </body>
 </html>

site/text_functions.php

+<?php
+
+function highlight_search_terms($array, $search_term){
+  $replacement = "<span class='search_term'>$search_term</span>";
+  $result = str_ireplace($search_term, $replacement, $array);
+  return $result;
+}
+
+?>