Troubleshooting XML DOM in PHP

DOM.If you have php5 and apache2 installed and DOM is enabled according to phpinfo, but you get following error when you use domxml_open_file($file), I get following error

Fatal error: Call to undefined function domxml_open_file() in …

This is due to domxml_open_file is DOM XML function. DOM XML is now moved to the PECL repository and no longer shipped with PHP 5. If you need DOM functions, you need to use DOM.

Parsing XML using XML::Simple

Installing XML::Simple:

shell> perl -MCPAN -e shell cpan> install XML::Simple

Reading XML: You can use XMLin and XMLout to read and write XML file or string.

my $ref = XMLin('/dir/to/file.xml'); # it takes file my $ref2 = XMLin('<xml> .... '); # or string

Example of reading a podcast feed:

#!/usr/bin/perl -w use strict; use warnings; use LWP::Simple; use XML::Simple; use Data::Dumper; my $url = 'http://url/feed.xml'; my $content = get $url; die "Couldn\'t get $url" unless $content; my $ref = XMLin($content); my @items = @{$ref->{'channel'}->{'item'}}; # grabbing link for my $i ( 0 .. $#items ) { print ${$items[$i]}{'link'} . "\n"; }