Re: [PHP] grabbing data from a site

[Tom Culpepper]

Try this function, Ijust wrote it for the same purpose. You just need a unique string in front of the stuff you want, and one after it. You can usually get a string of code on either end that will do this. The function will open the URL, find the anchor strings you told it, then strip them away leaving only the text/code that was in between them

<?
function get_item($url, $start, $end) {
global $item;
if(!($fp=fopen($url,"r"))) {
echo $url." is not accessable";
exit;
}
while(!feof($fp)) {
$item.=fgets($fp,255);
}

fclose($fp);
$start_position=strpos($item, $start)+strlen($start);
$end_position=strpos($item, $end);
$length=$end_position-$start_position;
$item=substr($item, $start_position, $length);
}
echo $item;
?>

Tom Culpepper
Multicast Technologies

Adam wrote:

someone gave me the following expression which uses another program and it
works fine for them... is there something similar with php?

wget --timeout=90 -q -O- http://www.BoM.GOV.AU/products/IDO30V01.shtml | sed
'1,/>Melbourne <sup/d' | sed '1d;3,$d;s/.*">//;s/<.*//'

thanks,
adam.

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If the target is in well-formed XML (XHTML is an example), you could use

XSLT

to say 'i want the third column of a particular row - in this instance,
Melbourne'. However, since few people actually adhere to standards, you're
probably going to need a regex... if you're not comfortable with them,
explode() could be useful (although it is slower)

Somebody posted an extremely helpfull little quick reference at

php.net/ereg,

i think... that might help you.


On Friday 22 November 2002 01:40 pm, Adam wrote:

I have the following website that i want to grab info from:

http://www.bom.gov.au/products/IDV60034.shtml

Say I wanted the current temperature for Melbourne from this table, what
line of code would I need to tell it to get that info - ie, an ereg()
expression...

i'm wondering whether there are ways of saying "i want the third column

of

a particular row - in this instance, Melbourne"?

Thanks for any help.
Adam.

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