New in Symfony 4.3: DomCrawler improvements
January 18, 2019
•
Published by
Javier Eguiluz
Warning: This post is about an unsupported Symfony version. Some of this information may be out of date. Read the most recent Symfony Docs.
Extract Element Names
Contributed by
Andrey Helldar
in #29127.
The extract() method returns the attribute and/or node values from a given
list of nodes. You can use the special attribute _text to get the value of
nodes. In Symfony 4.3 you can also use the new special attribute _name to
get the element name (the HTML tag name):
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$attributes = $crawler->filterXPath('//body/*')
->extract(['_text', '_name', 'class'])
;Default values for text() and html()
Contributed by
Roberto Espinoza
in #28581.
When a node is empty, calling the text() and html() methods resulted in
an \InvalidArgumentException with the well-known message "The current node
list is empty.". In Symfony 4.3 these methods allow passing an argument that
will be returned when the node is empty, so you can consider it a "default"
value for the node:
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// return an empty string instead of throwing an exception
$title = $crawler->filter('aside h3')->text('');
// return a default HTML content instead of throwing an exception
$userProfile = $crawler->filter('.user-profile')->html('<b>Anonymous User</b>');Help the Symfony project!
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