<?PHP
/**
* Class: yahoo.stocks.class.php
* Require: mySQL (if using cache functionality)
* Optional:
* Description: A class to grab the latest stocks from Yahoo Finance, and to cache them optionally
* Created on: Thu, 31 Jul 2003 14:01:46 +0200
* Last Change: Wed, 31 Mar 2004 12:59:35 +0200
* Author: Marc Giombetti <marc@giombetti.com>
* Website: http://www.giombetti.com
* Copyright: GPL - General Public License
* Version: 0.2
* Bugfies: Scott Bratcher (Problems with -6 timezones)
*
* -----------------------------------------------------------------------------
* Configuration options
*
* $time - Difference in time between you and the yahoo Server (GMT)
* $refreshtime - How often a value may (at most) be checked for on the yahoo website (in minutes)
* (Minimal value is 0,25 because yahoo updates the stocks approx every 15sec)
* The following values are only necessary if the cache functionality is used
* $dbhost - mySQL database host
* $user - mySQL username
* $passwd - mySQL password
* $db - mySQL database
* $stocks_table - mySQL table
*
* -----------------------------------------------------------------------------
* mySQL table structure (only needed if cache functionality is used and no active mySQL connection to $db is present)
*
* CREATE TABLE `stocks` (
* `ID` int(11) NOT NULL auto_increment,
* `stock` varchar(64) NOT NULL default '',
* `value` varchar(16) NOT NULL default '0',
* `changepoints` varchar(16) NOT NULL default '0',
* `open` varchar(16) NOT NULL default '',
* `intra_top` varchar(16) NOT NULL default '',
* `intra_down` varchar(16) NOT NULL default '',
* `date` varchar(10) NOT NULL default '',
* `time` varchar(6) NOT NULL default '',
* `unixtime` int(12) NOT NULL default '0',
* `reallocaltime` int(12) NOT NULL default '0',
* `md5` varchar(32) NOT NULL default '',
* PRIMARY KEY (`ID`)
* ) TYPE=MyISAM AUTO_INCREMENT=39 ;
*
* -----------------------------------------------------------------------------
* How to use this class? - Examples:
*
* $stocks = new yahoo_stocks();
* $stocks->my_connect();//if you have no open mySQL connection (yet)
* $eurostoxx = $stocks->get_stocks("^STOXX50E", "y"); //Get data for Euro StoXX 50 and use cache (returns an array)
* $dowjones = $stocks->get_stocks("^DJI", "n");//Dow Jones and no cacheing
* echo var_dump($stocks->get_stocks("^DJI", "n"));//displays the kind of array this class returns
* $stocks->my_close();
*
* -----------------------------------------------------------------------------
* Some tock keywords:
* ^DJI - Dow Jones
* ^IXIC - Nasdaq
* ^GSPC - S&P 500
* ^STOXX50E - Euro STOXX50
* For more stock keywords visit http://finance.yahoo.com
* -----------------------------------------------------------------------------
*/
class yahoo_stocks {
/**
* Time difference Between Yahoo and your local time;
*/
var $time = "+6"; //ATTENTION: daylight saving isn't (yet) respected
var $refreshtime = "1"; //minimal 0,25 because yahoo updates their values approx every 15sec!
var $dbhost = "localhost";
var $user = "root";
var $passwd = "";
var $db = "test";
var $stocks_table = "stocks";
/**
* how long should quote values be stored in mysql (0 = unlimited / otherwise time in days)
*/
var $keepfilesfor = 0;
/**
* yahoo_stocks :: get_stocks()
* :: ATTENTION - IF THE CACHE IS USED - calling this
* :: function will need an open mySQL connection to be present!
* :: use my_connect() first
*
* @param $stock Stock shortcut
* @param $cache (y or n)
* @return array ()
*/
function get_stocks($stock, $cache)
{
if ($cache == "y") {
if ($this->keepfilesfor != "0") {
$deletefrom = time() - $this->keepfilesfor * 24 * 3600;
$mystock = mysql_escape_string($stock);
$q = "DELETE FROM `$this->stocks_table` WHERE stock='$mystock' AND reallocaltime<'$deletefrom'";
mysql_query($q);
}
$timeout = time()-60 * $this->refreshtime;
$mystock = mysql_escape_string($stock);
$q = "SELECT * FROM `$this->stocks_table` WHERE stock='$mystock' AND reallocaltime>'$timeout' ";
$q .= "ORDER BY `unixtime` DESC LIMIT 1";
$d = mysql_query($q);
if (!mysql_num_rows($d)) {
$reallocaltime = time();
$return = $this->generate_stock_array($stock);
/**
* Check the mysql database to prevent double entries using the md5 hash
*/
$qquery = "SELECT * FROM `$this->stocks_table` WHERE md5='${return['md5']}'";
$qcheck = mysql_query($qquery);
if (mysql_num_rows($qcheck)) {
$x = mysql_fetch_array($qcheck);
return $x;
} else {
$sql = "INSERT INTO `$this->stocks_table` (`stock` , `value` , `changepoints` , `open` , `intra_top` , `intra_down` , `date` , `time` , `unixtime` , `reallocaltime`, `md5` )";
$sql .= "VALUES('${return['stock']}','${return['value']}','${return['changepoints']}','${return['open']}','${return['intra_top']}','${return['intra_down']}',";
$sql .= "'${return['date']}','${return['time']}','${return['unixtime']}','$reallocaltime','${return['md5']}')";
mysql_query($sql);
return $return;
}
} else {
$x = mysql_fetch_array($d);
return $x;
}
} else {
return $this->generate_stock_array($stock);
}
}
/**
* yahoo_stocks::generate_stock_array()
*
* :: please don't use this function - Use get_stocks() instead
* :: this function is for internal use in get_stocks()
*
* @param $stock
* @return
*/
function generate_stock_array($stock)
{
$open = fopen("http://finance.yahoo.com/d/quotes.csv?s=$stock&f=sl1d1t1c1ohgv&e=.csv", "r");
$read = str_replace("", "", trim(fread($open, 2000)));
$data = explode(",", $read);
fclose($open);
/**
* Converting yahoo's date to local date
*/
$strtotime_date = strtotime(str_replace('"', '', "$data[2] $data[3]"));
if (eregi("^-.*", $this->time)) {
$this->time = str_replace("-", "", $this->time);
$return['unixtime'] = $strtotime_date - $this->time * 3600;
} else {
$this->time = str_replace("+", "", $this->time);
$return['unixtime'] = $strtotime_date + $this->time * 3600;
}
$return['stock'] = $data[0];
$return['value'] = $data[1];
$return['date'] = date("j.n.Y", $return['unixtime']);
$return['time'] = date("G:i", $return['unixtime']);
$return['changepoints'] = $data[4];
$return['open'] = $data[5];
$return['intra_top'] = $data[6];
$return['intra_down'] = $data[7];
$return['md5'] = md5($read);
if ($return['value'] == "0.00" && $return['date'] == "1.1.1970") {
die("ERROR: yahoo.stocks.class.php - <b>$stock</b> is no valid stock");
}
return $return;
}
/**
* yahoo_stocks :: get_stock_bundle() :: uses an array ($symbols) to gather several stock quotes at once
*
* @param $symbols ;
* @return ;)
*/
function get_stock_bundle($syms)
{
foreach ($syms as $s) {
$bundle[$s] = $this->generate_stock_array($s);
}
return $bundle;
}
/**
* yahoo_stocks :: my_connect() :: Connect to the mySQL server
*
* @return mysql _connection
*/
function my_connect()
{
$this->conn = @mysql_connect($this->dbhost, $this->user, $this->passwd) or die("Can't connect to mySQLn");
return mysql_select_db($this->db, $this->conn);
}
/**
* yahoo_stocks :: my_close() :: Disconnect from the mySQL server
*
* @return TRUE ;)
*/
function my_close()
{
return @mysql_close();
}
}
$stocks = new yahoo_stocks();
$stocks->my_connect();//if you have no open mySQL connection (yet)
$eurostoxx = $stocks->get_stocks("^STOXX50E", "y"); //Get data for Euro StoXX 50 and use cache (returns an array)
$dowjones = $stocks->get_stocks("^DJI", "n");//Dow Jones and no cacheing
echo var_dump($stocks->get_stocks("^DJI", "n"));//displays the kind of array this class returns
$stocks->my_close();
?>
! 
