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<?php namespace Masterminds; use Masterminds\HTML5\Parser\DOMTreeBuilder; use Masterminds\HTML5\Parser\Scanner; use Masterminds\HTML5\Parser\Tokenizer; use Masterminds\HTML5\Serializer\OutputRules; use Masterminds\HTML5\Serializer\Traverser; /** * This class offers convenience methods for parsing and serializing HTML5. * It is roughly designed to mirror the \DOMDocument native class. */ class HTML5 { /** * Global options for the parser and serializer. * * @var array */ private $defaultOptions = array( // Whether the serializer should aggressively encode all characters as entities. 'encode_entities' => false, // Prevents the parser from automatically assigning the HTML5 namespace to the DOM document. 'disable_html_ns' => false, ); protected $errors = array(); public function __construct(array $defaultOptions = array()) { $this->defaultOptions = array_merge($this->defaultOptions, $defaultOptions); } /** * Get the current default options. * * @return array */ public function getOptions() { return $this->defaultOptions; } /** * Load and parse an HTML file. * * This will apply the HTML5 parser, which is tolerant of many * varieties of HTML, including XHTML 1, HTML 4, and well-formed HTML * 3. Note that in these cases, not all of the old data will be * preserved. For example, XHTML's XML declaration will be removed. * * The rules governing parsing are set out in the HTML 5 spec. * * @param string|resource $file The path to the file to parse. If this is a resource, it is * assumed to be an open stream whose pointer is set to the first * byte of input. * @param array $options Configuration options when parsing the HTML. * * @return \DOMDocument A DOM document. These object type is defined by the libxml * library, and should have been included with your version of PHP. */ public function load($file, array $options = array()) { // Handle the case where file is a resource. if (is_resource($file)) { return $this->parse(stream_get_contents($file), $options); } return $this->parse(file_get_contents($file), $options); } /** * Parse a HTML Document from a string. * * Take a string of HTML 5 (or earlier) and parse it into a * DOMDocument. * * @param string $string A html5 document as a string. * @param array $options Configuration options when parsing the HTML. * * @return \DOMDocument A DOM document. DOM is part of libxml, which is included with * almost all distribtions of PHP. */ public function loadHTML($string, array $options = array()) { return $this->parse($string, $options); } /** * Convenience function to load an HTML file. * * This is here to provide backwards compatibility with the * PHP DOM implementation. It simply calls load(). * * @param string $file The path to the file to parse. If this is a resource, it is * assumed to be an open stream whose pointer is set to the first * byte of input. * @param array $options Configuration options when parsing the HTML. * * @return \DOMDocument A DOM document. These object type is defined by the libxml * library, and should have been included with your version of PHP. */ public function loadHTMLFile($file, array $options = array()) { return $this->load($file, $options); } /** * Parse a HTML fragment from a string. * * @param string $string the HTML5 fragment as a string * @param array $options Configuration options when parsing the HTML * * @return \DOMDocumentFragment A DOM fragment. The DOM is part of libxml, which is included with * almost all distributions of PHP. */ public function loadHTMLFragment($string, array $options = array()) { return $this->parseFragment($string, $options); } /** * Return all errors encountered into parsing phase. * * @return array */ public function getErrors() { return $this->errors; } /** * Return true it some errors were encountered into parsing phase. * * @return bool */ public function hasErrors() { return count($this->errors) > 0; } /** * Parse an input string. * * @param string $input * @param array $options * * @return \DOMDocument */ public function parse($input, array $options = array()) { $this->errors = array(); $options = array_merge($this->defaultOptions, $options); $events = new DOMTreeBuilder(false, $options); $scanner = new Scanner($input, !empty($options['encoding']) ? $options['encoding'] : 'UTF-8'); $parser = new Tokenizer($scanner, $events, !empty($options['xmlNamespaces']) ? Tokenizer::CONFORMANT_XML : Tokenizer::CONFORMANT_HTML); $parser->parse(); $this->errors = $events->getErrors(); return $events->document(); } /** * Parse an input stream where the stream is a fragment. * * Lower-level loading function. This requires an input stream instead * of a string, file, or resource. * * @param string $input The input data to parse in the form of a string. * @param array $options An array of options. * * @return \DOMDocumentFragment */ public function parseFragment($input, array $options = array()) { $options = array_merge($this->defaultOptions, $options); $events = new DOMTreeBuilder(true, $options); $scanner = new Scanner($input, !empty($options['encoding']) ? $options['encoding'] : 'UTF-8'); $parser = new Tokenizer($scanner, $events, !empty($options['xmlNamespaces']) ? Tokenizer::CONFORMANT_XML : Tokenizer::CONFORMANT_HTML); $parser->parse(); $this->errors = $events->getErrors(); return $events->fragment(); } /** * Save a DOM into a given file as HTML5. * * @param mixed $dom The DOM to be serialized. * @param string|resource $file The filename to be written or resource to write to. * @param array $options Configuration options when serializing the DOM. These include: * - encode_entities: Text written to the output is escaped by default and not all * entities are encoded. If this is set to true all entities will be encoded. * Defaults to false. */ public function save($dom, $file, $options = array()) { $close = true; if (is_resource($file)) { $stream = $file; $close = false; } else { $stream = fopen($file, 'wb'); } $options = array_merge($this->defaultOptions, $options); $rules = new OutputRules($stream, $options); $trav = new Traverser($dom, $stream, $rules, $options); $trav->walk(); /* * release the traverser to avoid cyclic references and allow PHP to free memory without waiting for gc_collect_cycles */ $rules->unsetTraverser(); if ($close) { fclose($stream); } } /** * Convert a DOM into an HTML5 string. * * @param mixed $dom The DOM to be serialized. * @param array $options Configuration options when serializing the DOM. These include: * - encode_entities: Text written to the output is escaped by default and not all * entities are encoded. If this is set to true all entities will be encoded. * Defaults to false. * * @return string A HTML5 documented generated from the DOM. */ public function saveHTML($dom, $options = array()) { $stream = fopen('php://temp', 'wb'); $this->save($dom, $stream, array_merge($this->defaultOptions, $options)); $html = stream_get_contents($stream, -1, 0); fclose($stream); return $html; } }
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