The DOMXPath class

(PHP 5, PHP 7, PHP 8)

简介

Allows to use XPath 1.0 queries on HTML or XML documents.

class DOMXPath {

/* 属性 */

public readonly DOMDocument $document;

public bool $registerNodeNamespaces;

/* 方法 */

public __construct(DOMDocument $document, bool $registerNodeNS = true)

public evaluate(string $expression, ?DOMNode $contextNode = null, bool $registerNodeNS = true): mixed

public query(string $expression, ?DOMNode $contextNode = null, bool $registerNodeNS = true): mixed

public static quote(string $str): string

public registerNamespace(string $prefix, string $namespace): bool

public registerPhpFunctionNS(string $namespaceURI, string $name, callable $callable): void

}

document: The document that is linked to this object.
registerNodeNamespaces: When set to true, namespaces in the node are registered.

版本	说明
8.4.0	It is no longer possible to clone a DOMXPath object. Doing so will result in an exception being thrown. Prior to PHP 8.4.0 this resulted in an unusable object.
8.0.0	The `registerNodeNamespaces` property has been added.

DOMXPath::__construct — Creates a new DOMXPath object
DOMXPath::evaluate — Evaluates the given XPath expression and returns a typed result if possible
DOMXPath::query — Evaluates the given XPath expression
DOMXPath::quote — Quotes a string for use in an XPath expression
DOMXPath::registerNamespace — Registers the namespace with the DOMXPath object
DOMXPath::registerPhpFunctionNS — Register a PHP functions as namespaced XPath function
DOMXPath::registerPhpFunctions — Register PHP functions as XPath functions