[READ-ONLY] Subtree split of the Symfony DomCrawler Component
PHP HTML
Latest commit cec494c Aug 2, 2016 @fabpot fabpot feature #19430 [DomCrawler] Add support for XPath expression evaluati…
…on (jakzal)

This PR was merged into the 3.2-dev branch.

Discussion
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[DomCrawler] Add support for XPath expression evaluation

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #19162
| License       | MIT
| Doc PR        | TODO

Example usage:

```php
<?php

use Symfony\Component\DomCrawler\Crawler;
use Symfony\Component\VarDumper\VarDumper;

require_once __DIR__.'/vendor/autoload.php';

$html = '<html>
<body>
    <span id="article-100" class="article">Article 1</span>
    <span id="article-101" class="article">Article 2</span>
    <span id="article-102" class="article">Article 3</span>
</body>
</html>';

$crawler = new Crawler();
$crawler->addHtmlContent($html);

VarDumper::dump($crawler->filterXPath('//span[contains(@id, "article-")]')->evaluate('substring-after(@id, "-")'));
// array:3 [
//   0 => "100"
//   1 => "101"
//   2 => "102"
// ]

VarDumper::dump($crawler->evaluate('substring-after(//span[contains(@id, "article-")]/@id, "-")'));
// array:1 [
//   0 => "100"
// ]

VarDumper::dump($crawler->filterXPath('//span[@class="article"]')->evaluate('count(@id)'));
// array:3 [
//   0 => 1.0
//   1 => 1.0
//   2 => 1.0
// ]

VarDumper::dump($crawler->evaluate('count(//span[@class="article"])'));
// array:1 [
//   0 => 3.0
// ]

VarDumper::dump($crawler->evaluate('//span[1]'));
// Symfony\Component\DomCrawler\Crawler { }
```

Commits
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3148fad [DomCrawler] Add support for XPath expression evaluation

README.md