Use DOMXPath And Function Query Php

Have the following html code section:

• first
  • subfirst

    Solution 1:

    This is what DOMBLAZE is for:

    /* DOMBLAZE */ $doc->registerNodeClass("DOMElement","DOMBLAZE"); class DOMBLAZE extends DOMElement{public function __invoke($expression) {return $this->xpath($expression);} function xpath($expression){$result=(new DOMXPath($this->ownerDocument))->evaluate($expression,$this);return($result instanceof DOMNodeList)?new IteratorIterator($result):$result;}}
    
    $list = $doc->getElementById('tree');
    
    foreach ($list('./li') as $item) {
        echo '- ', $item('string(./a)'), "\n";
        foreach ($item('./ul/li') as $subitem) {
            echo '-- ', $subitem('string(./a)'), "\n";
        }
    }
    

    Output:

    - first
    -- subfirst
    -- subsecond
    -- subthird
    - second
    -- subfirst
    -- subsecond
    -- subthird
    

    DOMBLAZE is FluentDOM for the poor.

    
    

    Solution 2:

    For the second level, you could use another query also:

    $dom = new DOMDocument();
    $dom->loadHTML($markup);
    $xpath = new DOMXpath($dom);
    $elements = $xpath->query('//ul[@id="tree"]/li');
    foreach($elements as $el) {
        $head = $xpath->query('./a', $el)->item(0)->nodeValue;
        echo "- $head <br/>";
        foreach($xpath->query('./ul/li/a', $el) as $sub) { // query the second level
            echo '-- ' . $sub->nodeValue . '<br/>';
        }
    }
    

    example out

    
    

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