<?php

/**
 * The DOMElement class
 * @link http://php.net/manual/en/class.domelement.php
 */
class DOMDocument extends DOMNode {
    /**
     * @return DOMNodeList<DOMElement>
     */
    public function getElementsByTagName($name) {}

    /**
     * @return DOMNodeList<DOMElement>
     */
    public function getElementsByTagNameNS($namespaceURI, $localName) {}
}

/**
 * The DOMElement class
 * @link http://php.net/manual/en/class.domelement.php
 */
class DOMElement extends DOMNode  {
    public function __construct(string $name, string $value = '', string $namespaceURI = '') {}

    /**
     * @return DOMNodeList<DOMElement>
     */
    public function getElementsByTagName($name) {}
    /**
     * @return DOMNodeList<DOMElement>
     */
    public function getElementsByTagNameNS($namespaceURI, $localName) {}
}

/**
 * @template-covariant TNode as DOMNode
 * @template-implements Traversable<int, TNode>
 */
class DOMNodeList implements Traversable, Countable {
    /**
     * The number of nodes in the list. The range of valid child node indices is 0 to length - 1 inclusive.
     *
     * @var int
     *
     * @since 5.0
     * @link http://php.net/manual/en/class.domnodelist.php#domnodelist.props.length
     */
    public $length;

    /**
     * @param int $index
     * @return TNode|null
     * @psalm-ignore-nullable-return
     */
    public function item($index) {}
}

/**
 * @template-covariant TNode as DOMNode
 * @template-implements Traversable<string, TNode>
 */
class DOMNamedNodeMap implements Traversable, Countable {
    /**
     * @var int
     */
    public $length;

    /**
     * @return TNode|null
     */
    public function getNamedItem(string $name): ?DOMNode {}

    /**
     * @return TNode|null
     */
    public function getNamedItemNS(string $namespaceURI, string $localName): ?DOMNode {}

    /**
     * @return TNode|null
     * @psalm-ignore-nullable-return
     */
    public function item(int $index): ?DOMNode {}
}

class SimpleXMLElement implements \Countable, \RecursiveIterator, \ArrayAccess
{
    /** @return array */
    public function getNamespaces(bool $recursive = false)
    {
    }
    /** @return array|false */
    public function getDocNamespaces(bool $recursive = false, bool $fromRoot = true)
    {
    }
    /** @return SimpleXMLIterator */
    public function children(?string $namespaceOrPrefix = null, bool $isPrefix = false)
    {
    }
    /** @return SimpleXMLIterator */
    public function attributes(?string $namespaceOrPrefix = null, bool $isPrefix = false)
    {
    }
    public function __construct(string $data, int $options = 0, bool $dataIsURL = false, string $namespaceOrPrefix = "", bool $isPrefix = false)
    {
    }
    /** @return SimpleXMLElement */
    public function addChild(string $qualifiedName, ?string $value = null, ?string $namespace = null)
    {
    }
    /** @return SimpleXMLElement */
    public function addAttribute(string $qualifiedName, ?string $value = null, ?string $namespace = null)
    {
    }
    /** @return string */
    public function getName()
    {
    }
    public function __toString() : string
    {
    }
    /** @return int */
    public function count()
    {
    }
    /** @return void */
    public function rewind()
    {
    }
    /** @return bool */
    public function valid()
    {
    }

    /** @return SimpleXMLElement */
    public function current()
    {
    }
    /** @return string|false */
    public function key()
    {
    }
    /** @return void */
    public function next()
    {
    }
    /** @return bool */
    public function hasChildren()
    {
    }
    /** @return SimpleXMLElement|null */
    public function getChildren()
    {
    }

    public function offsetExists($offset)
    {
    }

    public function offsetGet($offset)
    {
    }

    public function offsetSet($offset, $value)
    {
    }

    public function offsetUnset($offset)
    {
    }
}

class SimpleXMLIterator extends SimpleXMLElement
{

}