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DomQuery is a PHP library that allows you to easily traverse and modify the DOM (HTML/XML). As a library it aims to provide 'jQuery like' access to the PHP DOMDocument class.

Install the latest version with

$ composer require edwinhuish/domquery

$dom = new DomQuery('<div><h1 class="title">Hello</h1></div>');

echo $dom->find('h1')->text(); // output: Hello
echo $dom->find('div')->prop('outerHTML'); // output: <div><h1 class="title">Hello</h1></div>
echo $dom->find('div')->html(); // output: <h1 class="title">Hello</h1>
echo $dom->find('div > h1')->class; // output: title
echo $dom->find('div > h1')->attr('class'); // output: title
echo $dom->find('div > h1')->prop('tagName'); // output: h1
echo $dom->find('div')->children('h1')->prop('tagName'); // output: h1
echo (string) $dom->find('div > h1'); // output: <h1 class="title">Hello</h1>
echo count($dom->find('div, h1')); // output: 2

$dom = new DomQuery('<a>1</a> <a>2</a> <a>3</a>');
$links = $dom->children('a');

// foreach
$texts = [];
foreach($links as $key => $dq) { // $dq is DomQuery object
    $texts[] = $dq->text();
}
print_r($texts); // array('1','2','3')

// map 
$result = $links->map(function(DomQuery $dq, int $idx){
    return $dq->text();
});
// map method return Collection object
print_r($result->toArray()); // array('1','2','3')

// each, same as Collection's each method, break traversing if return false.
$links->each(function(DomQuery $dq, int $idx){
    if($idx === 1){
        return false;
    }
    $dq->text('changed');
});
print_r($links->texts()); // array('changed', '2', '3')

echo $links->text(); // output 1, return text of first child, if you need the result of all childs please use texts() or foreach, each, map method
echo $links[0]->text(); // output 1
echo $links->last()->text(); // output 3
echo $links->first()->next()->text(); // output 2
echo $links->last()->prev()->text(); // output 2
echo $links->get(0)->textContent; // output 1
echo $links->get(-1)->textContent; // output 3

DomQuery::create('<a title="hello"></a>')->attr('title') // hello

• .find( selector )
• .children( [selector] )
• .parent( [selector] )
• .closest( [selector] )
• .next( [selector] )
• .prev( [selector] )
• .nextAll( [selector] )
• .prevAll( [selector] )
• .siblings( [selector] )

• .contents() get children including text nodes
• .add( selector, [context] ) new result with added elements that match selector

• .is( selector )
• .filter ( selector ) reduce to those that match the selector
• .not( selector ) remove elements from the set of matched elements
• .has( selector ) reduce to those that have a descendant that matches the selector
• .first( [selector] )
• .last( [selector] )
• .slice( [offset] [, length]) like array_slice in php, not js/jquery
• .eq( index )
• .map( callable(elm,i) )

_{* [selector] can be a css selector or an instance of DomQuery|DOMNodeList|DOMNode}

• .text( [text] )
• .html( [html_string] )
• .append( [content],... )
• .prepend( [content],... )
• .after( [content],... )
• .before( [content],... )
• .appendTo( [target] )
• .prependTo( [target] )
• .replaceWith( [content] )
• .wrap( [content] )
• .wrapAll( [content] )
• .wrapInner( [content] )
• .remove( [selector] )
• .unwrap()
• .first()
• .last()
• .gt( int $index )
• .lt( int $index )

_{* [content] can be html or an instance of DomQuery|DOMNodeList|DOMNode}

• .attr( name [, val] )
• .prop( name [, val] )
• .css( name [, val] )
• .removeAttr( name )
• .addClass( name )
• .hasClass( name )
• .toggleClass ( name )
• .removeClass( [name] )

_{* addClass, removeClass, toggleClass and removeAttr also accepts an array or space-separated names}

• .get( index )
• .each ( callable(elm,i) )
• .data ( key [, val] )
• .removeData ( [name] )
• .index ( [selector] )
• .toArray()
• .clone()

• .class
• #foo
• parent > child
• foo, bar multiple selectors
• prev + next elements matching "next" that are immediately preceded by a sibling "prev"
• prev ~ siblings elements matching "siblings" that are preceded by "prev"
• * all selector
• [name="foo"] attribute value equal foo
• [name*="foo"] attribute value contains foo
• [name~="foo"] attribute value contains word foo
• [name^="foo"] attribute value starts with foo
• [name$="foo"] attribute value ends with foo
• [name|="foo"] attribute value equal to foo, or starting foo followed by a hyphen (-)

• :empty
• :even
• :odd
• :first-child
• :last-child
• :only-child
• :parent elements that have at least one child node
• :first
• :last
• :header selects h1, h2, h3 etc.
• :not(foo) elements that do not match selector foo
• :has(foo) elements containing at least one element that matches foo selector
• :contains(foo) elements that contain text foo
• :root element that is the root of the document
• :nth-child(n)
• :nth-child(even)
• :nth-child(odd)
• :nth-child(3n+8)
• :nth-child(2n+1)
• :nth-child(n+4) same as :gt(2)
• :nth-child(-n+4) same as :lt(4)
• :nth-child(3)
• :nth-child(-2)
• :nth-child(4n)
• :eq(0)
• :eq(-1)
• :lt(3)
• :gt(2)

• findOrFail( selector ) find descendants of each element in the current set of matched elements, or throw an exception
• loadContent(content, encoding='UTF-8') load html/xml content
• xpath(xpath_query) Use xpath to find descendants of each element in the current set of matched elements
• getOuterHtml() get resulting html describing all the elements (same as (string) $dom, or $elm->prop('outerHTML'))
• getRoot() get the root node

• XML content will automatically be loaded 'as XML' if a XML declaration is found (property xml_mode will be set to true)
• This in turn will also make saving (rendering) happen 'as XML'. You can set property xml_mode to false to prevent this.
• To prevent content with a XML declaration loading 'as XML' you can set property xml_mode to false and then use the loadContent($content) method.
• Namespaces are automatically registered (no need to do it manually)

Escaping meta chars in selector to find elements with namespace:

$dom->find('namespace\\:h1')->text();

• Works with PHP 7.0 or above
• Requires libxml PHP extension (enabled by default)

• https://github.com/Rct567/DomQuery