Comments on: XPaths with PHP by example

By: George Hafiz

George Hafiz — Fri, 23 Sep 2011 13:30:43 +0000

I used this for a little project to have at work – a live webcam image of the skyline across my city along with the current temperature, scraped from the met office website. Because the table grows throughout the day to display the temperature by hour, I wanted a position relative to the end of the table.

The penultimate row (one before last) contained the cell with the latest temperature in. Accessing relative positions is easy in XPath!

http://www.metoffice.gov.uk/weather/uk/se/solent_latest_temp.html

$xpath->query(“((//div[@id='obsTable']/table/tr)[last()-1])/td[3]“);

This finds the div with id ‘obsTable’ and selects the fourth cell of the ‘last – 1`th‘ row. Job done!

By: Christian

Christian — Thu, 12 May 2011 22:20:04 +0000

Thanks for the great article… i have been playing with this for hours and yours is the only example that talks about trimming back the xpath query and removing the front elements… this worked a treat first time! Thanks you saved me hours of work…

By: Michael

Michael — Sat, 24 Jul 2010 12:24:45 +0000

Thank you for writing this. It helped me work out how to use DOMXPath!

I wanted to extract an rss feed from a html document if it existed. Here’s what I came up with:

$html = new DOMDocument();
@$html->loadHtmlFile(‘http://www.example.com‘);
$xpath = new DOMXPath( $html );
$nodelist = $xpath->query( “//link[@rel='alternate']/@href” );
foreach ($nodelist as $n){
echo $n->nodeValue.”\n”;
}

By: alin

alin — Thu, 20 May 2010 08:10:18 +0000

my Xpath expression for a value from web is :

/html/body/div[@id='jive-forumpage']/table[3]/tbody/tr/td[1]/div[1]/div/table/tbody/tr[1]/td[3]/a[@id='jive-thread-1']

i can not query it. muss i remove tbody ?

By: Серфим по XHTML/XML с помощью XPath и PHP » proft.com.ua [Блог о Web, IT, life]

Tue, 14 Jul 2009 08:57:56 +0000

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