A library to evaluate CSS expressions.
This library can be used to select elements from a DOM Document using CSS selectors.
Simply execute the following command:
composer require soloproyectos-php/css-parserYou can create instances of CssParser from different sources:
// Loads a DOMDocument
$doc = new DOMDocument("1.0", "UTF-8");
$doc->loadXML('<root><item id="101" /><item id="102" /></root>');
$selector = new CssParser($doc);
// Loads a DOMElement
$doc = new DOMDocument("1.0", "UTF-8");
$doc->loadXML('<root><item id="101" /><item id="102" /></root>);
$root = $doc->documentElement;
$selector = new CssParser($root);
// Loads a file
$selector = new CssParser('/path/to/my/document.xml');
// Loads an URL
$selector = new CssParser('http://www.my-site.com/document.xml');Selects the first and the odd elements:
$doc = new DOMDocument("1.0", "UTF-8");
$doc->loadXML(
'<root><item id="101" /><item id="102" /></root>'
);
$selector = new CssSelector($doc);
// selects the first and the odd elements and prints them
$items = $selector->query('item:odd, item:first-child');
foreach ($items as $item) {
echo $doc->saveXML($item) . "\n";
}This library supports a wide variety of CSS Pseudo-filters such as :odd, :even, first-child, etc. But you can create customs ones. The following example declares a fibonacci pseudo-filter:
// is the position of the node a Fibonacci number?
$css->registerPseudoFilter("fibonacci", function ($node, $input, $position, $items) {
$isFibonacci = false;
if ($position > 0) {
$n = sqrt(5 * pow($position, 2) + 4);
$isFibonacci = $n - floor($n) == 0;
if (!$isFibonacci) {
$n = sqrt(5 * pow($position, 2) - 4);
$isFibonacci = $n - floor($n) == 0;
}
}
return $isFibonacci;
});
// selects only `fibonacci` nodes
$items = $selector->query('item:fibonacci');You will find more examples in the source code itself:
src/css/parser/CssParser.php
Enjoy it!