PHP code to capture YAHOO stock quotes in real time_PHP tutorial

function getYahooQuote($stockSymbol = "CCR")
{
if (!$targetURL) $targetURL = "http://finance.yahoo.com/q?s=$stockSymbol&d=t"; //设定要抓取的URL目标
$fd = fopen("$targetURL", "r");
$stopExtract = 0;
$startExtract = 0;
while (!feof($fd))
{
$buffer = fgets($fd, 4096);
//echo trim($buffer)." ";
if (strstr($buffer, "rowspan=3"))
{
//echo "extract started at line #$lineCount ";
$startExtract = 1;
}
if ($startExtract && !$stopExtract)
{

if (strstr($buffer, "{
$startPos = strrpos($buffer, "$buffer = substr($buffer, $startPos);
}
//$text = trim(strip_tags($buffer));
//echo trim($buffer)." ";

$buffer = str_replace(" ", " ", "$buffer");
if (strstr($buffer, "http://ichart.yahoo.com/v?s=$stockSymbol"))
{
//echo "ichart found!";
$stopExtract = 1;
}
$capturedHTML .= $buffer;