这是一个早期的PHP解析器，相当于实现了PHP对PHP脚本的解析。
示例代码：
<?php// Autoload required classesrequire "vendor/autoload.php";// Instantiate new parser instance$parser = new PhpParser\Parser();// Return and print an AST from string contents$astNode = $parser->parseSourceFile('<?php /* comment */ echo "hi!"');var_dump($astNode);// Gets and prints errors from AST Node. The parser handles errors gracefully,// so it can be used in IDE usage scenarios (where code is often incomplete).$errors = PhpParser\Utilities::getDiagnostics($astNode);var_dump(iterator_to_array($errors));// Traverse all Node descendants of $astNodeforeach ($astNode->getDescendantNodes() as $descendant) { if ($descendant instanceof \PhpParser\Node\StringLiteral) { // Print the Node text (without whitespace or comments) var_dump($descendant->getText()); // All Nodes link back to their parents, so it's easy to navigate the tree. $grandParent = $descendant->getParent()->getParent(); var_dump($grandParent->getNodeKindName()); // The AST is fully-representative, and round-trippable to the original source. // This enables consumers to build reliable formatting and refactoring tools. var_dump($grandParent->getLeadingCommentAndWhitespaceText()); } // In addition to retrieving all children or descendants of a Node, // Nodes expose properties specific to the Node type. if ($descendant instanceof \PhpParser\Node\Expression\EchoExpression) { $echoKeywordStartPosition = $descendant->echoKeyword->getStartPosition(); // To cut down on memory consumption, positions are represented as a single integer // index into the document, but their line and character positions are easily retrieved. $lineCharacterPosition = \PhpParser\Utilities::getLineCharacterPositionFromPosition( $echoKeywordStartPosition ); echo "line: $lineCharacterPosition->line, character: $lineCharacterPosition->character"; }}
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