Get the first sentence from a string

first_sentence.php

// Source: https://electrictoolbox.com/get-first-sentence-php/
function first_sentence($content) { 
   $content = html_entity_decode(strip_tags($content)); 
   $pos = strpos($content, '.'); 
   if($pos === false) { 
      return $content; 
   } 
   else { 
      return substr($content, 0, $pos+1); 
   } 
}