What is the best approach to extracting comments from an XML file in PHP?

To extract comments from an XML file in PHP, you can use the SimpleXMLElement class to parse the XML file and then iterate through the nodes to find and extract the comments. You can achieve this by checking if the node type is XML_COMMENT_NODE and then retrieving the comment text. 

$xml = simplexml_load_file('file.xml');
$comments = [];

function extractComments($node, &$comments) {
    foreach ($node->children() as $child) {
        if ($child->nodeType === XML_COMMENT_NODE) {
            $comments[] = $child->nodeValue;
        }
        extractComments($child, $comments);
    }
}

extractComments($xml, $comments);

print_r($comments);

Keywords

XML PHP parsing comments extraction

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