simple dom problem

[someoneneedshelps]

Im search some html for the £4.50 out of this...

<span id="fshippingCost" class="notranslate sh-cst "><span>£4.50</span>

using this code

	foreach($html->find('span[id=fshippingCost]') as $shippingcost)
	{
		$arrayresults[] = $shippingcost->plaintext;
		$shippingcoststr = $shippingcost->plaintext;
	}

strangest result back is £17.33 why???

 

[ChrisHirst]

Using what DOM parser??

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
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[someoneneedshelps]

Simple dom html parser, got other things working im baffled

 

[vacunita]

Is it possible there's another span with that ID somewhere else in he HTML that has that value?

Are you doing anything else with the array before outputting to screen?

How many elements end up in the $arrayresults array?



----------------------------------
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Web & Tech

 

[someoneneedshelps]

I have just changed to this which still comes up with this £17.33 .?? it doesn't exist see above

foreach($html->find('span[class=sh-cst]') as $key => $info) 
{
	echo ($key + 1).'. '.$info->plaintext."<br />\n";
}

 

[someoneneedshelps]

If I was to make an efficient attempt to attract the £4.50 what would be the simplest method? I have other ones to track also so if I could clinch it that would be marvellous

 

[someoneneedshelps]

Ive just done this to make sure im not going mad and I get the correct result so what is the problem with above?

	$html1 = str_get_html('<span id="fshippingCost" class="notranslate sh-cst "><span>£4.50</span>');
	$html1->find('span[class=sh-cst]');
	echo "<br>meeeee".$html1->plaintext."<br>";

 

[someoneneedshelps]

Ok, what do i search when locating span elements? Should i just use all elements and pull out the id of the one i want? thats not very good if modificatios are made

 

[ChrisHirst]

Should i just use all elements and pull out the id of the one i want?

Yes

thats not very good if modificatios are made

And??

That's just the way it is, your task in that case is to detect something has changed and handle it in some way.


Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
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[someoneneedshelps]

I'm still getting the wrong value out, im baffled, I use span span span to bring the list down and still its the wrong value

 

[ChrisHirst]

Have you tried removing the '£' and casting the resulting string to a floating point value before trying any mathematical operations?

Have you done any "debugging 101" steps, such as writing the 'scraped' string value to the browser to verify that you are getting the results you expect from the DOM extraction?



Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
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[someoneneedshelps]

I did you first suggestion and it turns out has 17.33 TODAY?? its 17.34?

I did this

http://www.tek-tips.com/viewthread.cfm?qid=7281504

when you say scraping you mean looking for a word? yes and it comes back negative... heres the code, does it need any adjustment?

if(scraping_for_text($url,'Buy it now'))
   $binstr = "Buy it now";
else
   $binstr = "Not Found";*/

function scraping_for_text($iUrl,$iText)
{
	echo "iUrl=".$iUrl."<br />";
	echo "iText=".$iText."<br />";

    // create HTML DOM
    $html = file_get_html($iUrl);

    // get text elements
    $aObj = $html->find($iText);
    if (count($aObj) > 0)
    {
	   echo "<BR>Num = " . count($aObj) . "<br>";
       $condition = True;
	   echo "<h4>Found ".$iText."</h4>";
    }
    else
    {
	   echo "<BR>Num = " . count($aObj) . "<br>";
       $condition = false; 
	   echo "<h4>No ".$iText." found"."</h4>";
    }    

    // clean up memory
    $html->clear();
    unset($html);

    return $condition;
}

 

[someoneneedshelps]

Ive tried everything, got stupid bug I cannot solve.... how does £4.50 become NOW.... £17.34

 

[ChrisHirst]

scraping" is a term used to describe the action of requesting a URL then extracting the text from the response rather than rendering and displaying it in a browser.

What is the URL of the page you are extracting from?

and when you said it is "simple dom html parser", should that be Simple HTML DOM Parser meaning this component

http://simplehtmldom.sourceforge.net/

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
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or this

http://php.net/manual/en/domdocument.loadhtml.php

?

or something else?

 

[someoneneedshelps]

Im extracting of many pages of similar format, ie: <span id=thesameineverypage> etc and yes its the component above im using

 

[ChrisHirst]

Im extracting of many pages of similar format,

Just a representative one will do. Without that how exactly are we supposed to figure out all the possible problems?

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
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[someoneneedshelps]

this has never failed...

	foreach($html->find('span[itemprop=price]') as $price)
	{
		$arrayresults[] = $price->plaintext;
		$pricestr = $price->plaintext;
	}

the above is and its the same idea as above, pull out the span element that has itemprop = price

 

[ChrisHirst]

this has never failed...

Which demonstrates what exactly?

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
Webmaster Forum

 

[someoneneedshelps]

I have no idea, both ate there one works one doesnt

 

[ChrisHirst]

I have no idea, both ate there one works one doesnt

Okay, I'll point out what it probably demonstrates then.


It demonstrates that there are differences in the source of the data.

If it works with 'A' but not with 'B' then 'B' is different to 'A'

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
Webmaster Forum