How to filter by id with Symfony 2 Dom Crawler?

Question

This works

$this->assertEquals(1, $crawler->filter('.elementClass')->count()); // filter by class

But, this doesn't seem to work.

$this->assertEquals(1, $crawler->filter('#elementId')->count()); // filter by id

Any ideas?

Solution

Symfony2 DOM Crawler filter internally uses DOMXPath, so you can find answer for your question on this thread

query for filter should be something like(note that code bellow is untested, I'm sure link above will help you)

//*[@id='elementId']

Comments

[Sukhrob]

Thank you for your answer. I used both filter() and filterXPath() methods. But, they didn't work.

[Igor]

You have tried something like $crawler->filter('//yourtagname[@id="1"]')->count() and it didnt work?

[Sukhrob]

By the way, I am filtering HTML, not XML.

[Sukhrob]

$crawler->filter('//yourtagname[@id="1"]')->count() shows error "Unexpected symbol". $crawler->filterXPath('//yourtagname[@id="1"]')->count() does not show error. But, it cannot find the element with id.

[Igor]

Yup it seams that filter should work only for css selectors (github.com/symfony/DomCrawler/blob/master/Crawler.php) ** * Filters the list of nodes with a CSS selector. * * This method only works if you have installed the CssSelector Symfony Component.

[Igor]

I dont think filtering tags in HTML should be different than filtering XML tags. Maybe you can omit one / like "/yourtagname[@id='elementId']" . I can not try code on my machine right now, so i'm guessing

[Sukhrob]

I installed CssSelector. Otherwise, my filter with class shouldn't have worked.

[Igor]

Yeah I know that, I just copypasted more text then I should :) I just wanted to say that you should use filterXPath for your need. filter method is only for css

[Sukhrob]

No, it didn't. It is really strange.

[Igor]

You marked this answer as correct, do you solve problem and what is the final solution?

[Sukhrob]

You were right. Even $this->assertEquals(1, $crawler->filter('#elementId')->count()); works. In my company, we use short open tags. I forgot to enable that. Thank you very much for your help, icrew. Beware, short open tags are bad :(.