$hora = mysql_query("SELECT * FROM users");
while($row = mysql_fetch_assoc($hora)) {
$message = "pm do vsichki";
$tema = "system message";
mysql_query("INSERT INTO `pms` (author, subject, message, do) VALUES ('System', '$tema', '$message', '$row[username]')");
}
echo "Изпратихте ".mysql_num_rows($hora)." съобщения";