Class for capturing YAHOO stock quotes

The function of capturing YAHOO stock quotes in real time. you can learn the ideas and specific code to broaden your knowledge. The code is as follows:
Function getYahooQuote ($ stockSymbol = "CCR ")
{
If (! $ TargetURL) $ targetURL = "http://finance.yahoo.com/q? S = $ stockSymbol & d = t "; // Set the URL target to be crawled
$ Fd = fopen ("$ targetURL", "r ");
$ StopExtract = 0;
$ StartExtract = 0;
While (! Feof ($ fd ))
{
$ Buffer = fgets ($ fd, 4096 );
// Echo trim ($ buffer). "\ n ";
If (strstr ($ buffer, "rowspan = 3 "))
{
// Echo "extract started at line # $ lineCount \ n ";
$ StartExtract = 1;
}
If ($ startExtract &&! $ StopExtract)
{
If (strstr ($ buffer ,"{
$ StartPos = strrpos ($ buffer, "<");
$ Buffer = substr ($ buffer, $ startPos );
}
// $ Text = trim (strip_tags ($ buffer ));
// Echo trim ($ buffer). "\ n ";
$ Buffer = str_replace ("\ n \ r", "", "$ buffer ");
If (strstr ($ buffer, "http://ichart.yahoo.com/v? S = $ stockSymbol "))
{
// Echo "ichart found! ";
$ StopExtract = 1;
}
$ CapturedHTML. = $ buffer;
}
If ($ startExtract & strstr ($ buffer ,"
"))
{
$ StopExtract = 1;
// Echo "extract stopped at line # $ lineCount \ n ";
Echo $ capturedHTML;
Break;
}
$ LineCount;
}
Fclose ($ fd );
}
// The following is an example of capturing
$ Symbols = array ('cca', 'iixl ', 'Sape', 'wbvn ');
$ SymbolCount = count ($ symbols );
For ($ I = 0; $ I <$ symbolCount; $ I)
{
Echo "$ symbols [$ I]
";
GetYahooQuote ("$ symbols [$ I]");
}
?>