Login re-direct Issue in post comment area in php
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If someone wishes to comment on any item e.g. and article or forum item etc in my site. It prompts them to login/create account. Is it possible to make sure that when the client logs in it takes them back to the comment they wanted to make?. But now its going not like this flow.
User not login that re-direct to login page..but i want after login this section user automatically re-direct current post comment area. there is any way ?

 <?php if ($sessionUser == 1 || $sessionSeller == 1 || $sessionadmin == 1) { ?>
    <form class="cp_form" action="article_comments_db.php" method="post" name="frm_comment" id="frm_comment">
      <div id="div_req_comment" class="cp_infopanel_off">
        <span><?= $_Reviews ?></span>:<span class="red">*</span>
        <textarea class="cp_textarea" id="req_comment" name="req_comment" onBlur="do_blur(this.id)" onFocus="do_focus(this.id)"></textarea>
        <div id="infobox_req_comment" class="cp_infobox"></div>
      </div>
      <input type="button" id="btn_submit" class="rp_button" value="<?= $_Submit ?>" onClick="validate_form('frm_comment')" />    
      <input type="hidden" name="id" value="<?php echo $id ?>" />
    </form>
  <?php } else {
    ?><br /><br /><div align="right"><input type="button" id="btn_submit" class="rp_button" value=" <?= $_Post_comment ?> " onClick="window.location.href='login.php?event=Account'" /></div><?php
}