get value from external webpage (php or java)

Question

I need to get a number from a external webpage

<span>
<b>Maximum price:</b>
7 //value i need
</span>

Then display said number

You're going to have to give us some more details, here. Do you want to write a script in PHP or Java which will fetch a web site over HTTP and extract a certain portion of it? Or what? — Borealid, Jan 01 '11 at 07:52

score 2 · Answer 1 · answered Jan 01 '11 at 10:22

In Java you can use HTMLUnit library. It's good at HTML extraction. For example something similar to:

webClient=new WebClient();
HtmlPage page=webClient.getPage(url);
for(HtmlElement elem:page.getElementsByTagName("span")) {
   //And then getChildren(), getText ...
}

Andrew Culver · Answer 2 · 2011-01-06T03:37:41.427

1

The following code works. I've used this thread as the source page.

<?php

// Read the whole file.
$lines = file('http://stackoverflow.com/questions/4573498/get-value-from-external-webpage-php-or-java');

// Go through every line ..
while ($line = array_shift($lines)) {

        // Stop when you find the label we're looking for.
        if (strpos($line, 'Maximum price') !== false) break;

}

// The next line has your value on it.
$line = array_shift($lines);

// Print the first word on the line.
$values = explode(' ', $line);
echo $values[0];

edited Jan 06 '11 at 03:37

answered Jan 01 '11 at 08:10

Andrew Culver

1,967
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13
7

1

The split function is deprecated. – Anthony Jan 01 '11 at 21:23
Thanks for pointing that out. I replaced it with an equivalent explode() call. – Andrew Culver Jan 06 '11 at 03:38

score 0 · Answer 3 · answered Jan 01 '11 at 08:00

0

If you know the address of the page and you are sure that their content will not change during the time, you can find the number by means of DOM. But I need more detail about your problem.

answered Jan 01 '11 at 08:00

ehsun7b

4,796
14
59
98

http://services.runescape.com/m=itemdb_rs/viewitem.ws?obj=1040 Im trying to get the min man and market price values. – Anthony Jan 01 '11 at 21:55
At first download the PHP Simple HTML DOM Parser here: http://sourceforge.net/projects/simplehtmldom/files/ then you can use its examples here: http://simplehtmldom.sourceforge.net/ If you need more help please let me know. – ehsun7b Jan 02 '11 at 08:04
// Create DOM from URL or file $html = file_get_html('http://www.google.com/'); // Find all images foreach($html->find('img') as $element) echo $element->src . '
'; // Find all links foreach($html->find('a') as $element) echo $element->href . '
'; – ehsun7b Jan 02 '11 at 08:07

get value from external webpage (php or java)

3 Answers3

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