Redirect From WordPress Widget to URL in excerpt of the post.

wpWidgetRedirectToExcerptURL.php

<?php 
$excerpt = get_the_excerpt();
$categories = get_the_category();
$cat = "";
$flag1=false;
$flag2=false;
if ( ! empty( $categories ) ) {
    $cat=esc_html( $categories[0]->name );   
    echo "Category=".$cat."</br>";
   if($cat == "News"){
     $flag1=true;
    }
}
  
if (filter_var($excerpt, FILTER_VALIDATE_URL)) { 
  echo "Excerpt is Url = ".$excerpt;
   $flag2=true;
}
else{
  echo "excerpt is not url";
}

if($flag1 == true && $flag2 == true)
{
echo "</br>Hurrrayyyy</br>";
  if(is_single()){
    echo '<script type="text/javascript">';
    echo 'window.location="'.$excerpt.'";';
    echo '</script>';
    }
}
else{
  echo "</br>:(</br>";
}
?>