regex php - find value in div with specific ID

Question

How can i do to find the content of this div with preg_match()?

The link to my page can be found here.

I want get the product value of this page. I did something like this but i can't get nothing:

if (!preg_match("<div id=\"productPrice\">(.*)<\/div>/si", $data, $dealer_price)) 
    return;

I am also trying the following:

if (!preg_match("<div class=\"price\">(.*)<\/div>/si", $data, $dealer_price)) 
    return;

Thank you in advance for your help.

It is not only easier to use DOM, it is also safer and more reliable. Like your preg won't match `
` ? Or `
` — Daniel W., Aug 12 '14 at 18:58
i am also using
but cant work. my page link is added in question — pramod24, Aug 12 '14 at 19:00
May I refer you to this answer: http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454 — Guillermo Gutiérrez, Aug 12 '14 at 19:50

hwnd · Accepted Answer · 2014-08-12T20:06:20.353

6

There are a few reasons your regular expression is not working as you expect.

You supply no delimiter in the beginning of your expression.
There is an attribute after your div @id attribute.
* is a greedy operator, you should use *? to return a non-greedy match.
If you want the value you need to return your captured group.

To fix your regular expression:

preg_match('~<div id="productPrice"[^>]*>(.*?)</div>~si', $data, $dealer_price);
echo trim($dealer_price[1]); //=> "$249.95"

Use DOM to grab the product value from your data, not regular expression.

$doc = new DOMDocument;
$doc->loadHTML($data);

$xpath = new DOMXPath($doc);
$node  = $xpath->query("//div[@id='productPrice']")->item(0);
echo trim($node->nodeValue); //=> "$249.95"

edited Aug 12 '14 at 20:06

answered Aug 12 '14 at 19:08

hwnd

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+1 The quantifier between tags must be lazy. Since you have the id (that is unique) no need to use xpath, use directly getElementById – Casimir et Hippolyte Aug 12 '14 at 19:40
@hwnd: it's an eval.in bug, works well on my server. – Casimir et Hippolyte Aug 12 '14 at 22:13

score 0 · Answer 2 · answered Aug 12 '14 at 19:05

0

The regexes in preg need to be enclosed in delimiters, such as ~ or / etc. Also, you need to use lazy matching in your expression:

preg_match( "@<div id=\"productPrice\">(.*)</div>@siU", $data, $dealer_price )

answered Aug 12 '14 at 19:05

hjpotter92

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score 0 · Answer 3 · answered Aug 12 '14 at 19:07

<?php
  $data = '<body><div id="productPrice">12.20</div></body>';
  if(!preg_match('/<div id="productPrice">(.*)<\/div>/si', $data, $dealer_price)) return;

  $dealer_price = $dealer_price[0];
  echo $dealer_price;
?>

hope this helps..

regex php - find value in div with specific ID

3 Answers3