Here is a function to get stock quote information from yahoo:

function getquote($symbol)
{
if (empty($symbol)) {
$symbol = '^dji';
}
$fields = 'sl1d1t1c1ohgv';
// we use yahoo to get the quotes
//http://download.finance.yahoo.com/d/quotes.csv?s=%5EDJI&f=sl1d1t1c1ohgv&e=.csv
$host = 'http://download.finance.yahoo.com';
// construct the url
$url = $host . '/d/quotes.csv?s='. urlencode($symbol) .'&f='.$fields.'&e=.csv';
// ask yahoo for the .csv file
$csv = fopen($url, "r");
$data = fgetcsv($csv,10000,",");
return $data;
}

How to use the above function:
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