php - Can't insert and update at the same time -


i have code below , can't figure why it's not working. problem it's can insert post it, when try update post it's create new page instead update.

i have tried remove isset if(isset($_post['id']) != 'null') , update work, insert doesn't work anymore.

any idea it's wrong code? thanks.

    <?php           if(isset($_post['submitted']) == 1)          {              $title = mysqli_real_escape_string($dbc, $_post['title']);             $header = mysqli_real_escape_string($dbc, $_post['header']);             $body = mysqli_real_escape_string($dbc, $_post['body']);              if(isset($_post['id']) != 'null')             {                 $q = "update pages set user = $_post[user], title = '$title', header = '$header', body = '$body' id = $_get[id]";             }             else             {                 $q = "insert pages (user, title, header, body) values ($_post[user], '$title', '$header', '$body')";             }               $r = mysqli_query($dbc, $q);              if($r)             {                 $message = '<p>page added!</p>';             }              else              {                  $message = '<p>page not added because:</p>'.mysqli_error($dbc);                 $message .= '<p>'.$q.'</p>';             }          }     ?>

you using post , @ same time. first check whethet post or get. isset() check

<?php       if(isset($_post['submitted']) == 1)      {          $title = mysqli_real_escape_string($dbc, $_post['title']);         $header = mysqli_real_escape_string($dbc, $_post['header']);         $body = mysqli_real_escape_string($dbc, $_post['body']);          if(isset($_get['id']) && $_get['id']!="")          {             $q = "update pages set user = $_post[user], title = '$title', header = '$header', body = '$body' id = $_get[id]";         }          else          {             $q = "insert pages (user, title, header, body) values ($_post[user], '$title', '$header', '$body')";         }           $r = mysqli_query($dbc, $q);          if($r)         {             $message = '<p>page added!</p>';         }           else          {              $message = '<p>page not added because:</p>'.mysqli_error($dbc);             $message .= '<p>'.$q.'</p>';         }      } ?>

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