Question

After using curl i’ve got from an external page i’ve got all source code with something like this (the part i’m interested)

   (page...)<td valign='top' class='rdBot' align='center'><img src="/images/buy_tickets.gif" border="0" alt="T"></td> (page...)

So i’m using preg_match_all, i want to get only “buy_tickets.gif”

$pattern_before = "<td valign='top' class='rdBot' align='center'>";
$pattern_after = "</td>";
$pattern = '#'.$pattern_before.'(.*?)'.$pattern_after.'#si';

preg_match_all($pattern, $buffer, $matches, PREG_SET_ORDER);

Everything fine up to now… but the problem it’s becase sometimes that external pages changes and the image i’m looking for it’s inside a link

(page...)<td valign='top' class='rdBot' align='center'><a href="blaa" title="ble"><img src="/images/buy_tickets.gif" border="0" alt="T"></a></td> (page...)

and i dunno how to get always my code to work (not just when the image gets no link)

hope u understand

thanks in advance

Answer 1

Don’t use regex to parse HTML, Use PHP’s DOM Extension. Try this:

$doc = new DOMDocument;

@$doc->loadHTMLFile( 'http://ventas.entradasmonumental.com/eventperformances.asp?evt=18' ); // Using the @ operator to hide parse errors

$xpath  = new DOMXPath( $doc );

$img = $xpath->query( '//td[@class="BrdBot"][@align="center"][1]//img[1]')->item( 0 ); // Xpath->query returns a 'DOMNodeList', get the first item which is a 'DOMElement' (or null)

$imgSrc = $img->getAttribute( 'src' );

$imgSrcInfo = pathInfo( $imgSrc );

$imgFilename = $imgSrcInfo['basename']; // All you need