parsing html using DOM

Question

I want to parse the HTML data from a particular url provided. But i am not able to parse data as i am getting few errors.

This is my code :-

    $html = new DOMDocument();
    $html->loadHTML($url);  //$url is where the site url is defined
    $value = array();
    foreach($html->find($identifier) as $element) //$identifier is where div, a etc is stored
    {
        $value[] = $element->src."<br />";
    }
    print_r($value);

I am getting the following error

Call to undefined method DOMDocument::find()

Can anyone help me out with this .I am using cake-php 2.0

What is a specific example of identifier?

Explosion Pills
– Explosion Pills

2013-03-01 07:07:25 +00:00
Commented Mar 1, 2013 at 7:07 — Explosion Pills
– Explosion Pills, Commented Mar 1, 2013 at 7:07
for example i take $identifier = div

Php Geek
– Php Geek

2013-03-01 07:08:42 +00:00
Commented Mar 1, 2013 at 7:08 — Php Geek
– Php Geek, Commented Mar 1, 2013 at 7:08

Explosion Pills · Accepted Answer · 2013-03-01 07:12:35Z

2

As the error indicates, DOMDocument has no find method. However, it does have a lot of very nice DOM parsing methods: http://www.php.net/manual/en/class.domdocument.php

If $identifier is an element name, it would make sense to use

foreach ($html->getElementsByTagName($identifier) as $element) {
    $value[] = $element->nodeValue + "<br>";
}

answered Mar 1, 2013 at 7:12

Explosion Pills

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Comments

Micha van Eijk · Accepted Answer · 2013-03-01 07:12:30Z

1

This will not work:

$html->loadHTML($url);

LoadHTML loads a string, this will work for example:

$html->loadHTML("<html><body>Test<br></body></html>");

Try using loadHTMLfile:

$html->loadHTMLFile("filename.html");

See: http://www.php.net/manual/en/domdocument.loadhtmlfile.php

answered Mar 1, 2013 at 7:12

Micha van Eijk

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Comments

Jason Larke · Accepted Answer · 2013-03-01 07:13:39Z

How about reading the documentation on the class you're using? DOMDocument is well documented on the php.net site and has no mention of a find method, why would you presume it does?

DOMDocument has a lot of methods that are familiar to any JavaScript developer, such as getElementsByTagName and getElementById which should be what you're looking for.

Also, if you're loading the HTML from a URL, the DOMDocument::loadHTML method won't work, as it expects a string containing valid HTML, not a URI.

DOMDocument::loadHTMLFile might work with a URL parameter (can't be sure, don't have PHP installed on this computer to check), but if it doesn't you can combine DOMDocument::loadHTML and file_get_contents to get it to work.

alwaysLearn · Accepted Answer · 2013-03-01 07:28:30Z

0

As far as I can see the cake php documentation ... there is no find() function for domDocument Class.

How about using toArray() method of Xml class documented here

answered Mar 1, 2013 at 7:28

alwaysLearn

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