Get html block by PHP

Question

We have html page, it has many code inside.

Sometimes it has block #container, sometimes not.

All code of this page is inside $page variable.

How do I:

check, is there block with id="container"?
if html page has #container inside, then get it contents of this block and write to a variable $container.

Task should be done by php.

There are plenty of [HTML parsers](http://stackoverflow.com/questions/292926/robust-mature-html-parser-for-php) available for PHP. — NullUserException, Mar 03 '11 at 19:32
@NullUserException and they are slow as hell. Given that an id can only be used once, use a regex to check for `id="container"` then only take the performance hit of firing up the parser if necessary. — Endophage, Mar 03 '11 at 19:40

akrisanov · Accepted Answer · 2017-05-05T08:49:56.153

5

One of the possible ways to solve your problem is to use third party library. Let's say http://simplehtmldom.sourceforge.net/:

$html->load($page);
if ($html->find('#container')) $container = $html->find('#container');

edited May 05 '17 at 08:49

answered Mar 03 '11 at 19:35

akrisanov

score -2 · Answer 2 · answered Mar 03 '11 at 19:35

-2

Regexp is your friend here.

Good luck for your html parsing trip

answered Mar 03 '11 at 19:35

Shahor

2 Answers2