note 102464 added to function.mysql-insert-id

I just wrote a function, which returns the last inserted auto-incrementing id:

<?php
$r = mysql_query("INSERT INTO `my_table` (...) VALUES (...)");
$id = last_insert_id( $r );
if( false === $id) echo 'error';

function last_insert_id_after_single_insert( $r ){
  if( true !== $r) return false;
  if( 1 !== mysql_affected_rows()) return false;

  $r = mysql_query("SELECT LAST_INSERT_ID() AS `id`"); // INSERT returns true/false
  if( 1 !== mysql_num_rows( $r )) return false;  // false or other num

  $r = mysql_fetch_array( $r );
  if( false === $r) return false;

  return $r['id'];
}
?>
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Server IP: 69.147.83.197
Probable Submitter: 212.40.99.52
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Manual Page -- http://www.php.net/manual/en/function.mysql-insert-id.php
Edit        -- https://master.php.net/note/edit/102464
Del: integrated  -- https://master.php.net/note/delete/102464/integrated
Del: useless     -- https://master.php.net/note/delete/102464/useless
Del: bad code    -- https://master.php.net/note/delete/102464/bad+code
Del: spam        -- https://master.php.net/note/delete/102464/spam
Del: non-english -- https://master.php.net/note/delete/102464/non-english
Del: in docs     -- https://master.php.net/note/delete/102464/in+docs
Del: other reasons-- https://master.php.net/note/delete/102464
Reject      -- https://master.php.net/note/reject/102464
Search      -- https://master.php.net/manage/user-notes.php