StackOverflow2013

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plurals

PO
primarykey
Id
911674
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2009-05-26T16:52:45.483
FavoriteCount
0
LastActivityDate
2018-06-13T06:10:32.170
LastEditDate
2018-06-13T06:10:32.170
LastEditorUserId
73772
OwnerUserId
73772
ParentId
911663
PostTypeId
2
Score
76
ViewCount
0
LastEditorDisplayName
text
Body
<p>There are only two php APIs that are really suited for processing large files. The first is the old <a href="http://se2.php.net/manual/en/book.xml.php" rel="nofollow noreferrer">expat</a> api, and the second is the newer <a href="http://se2.php.net/manual/en/book.xmlreader.php" rel="nofollow noreferrer">XMLreader</a> functions. These apis read continuous streams rather than loading the entire tree into memory (which is what simplexml and DOM does).</p> <p>For an example, you might want to look at this partial parser of the DMOZ-catalog:</p> <pre><code><?php class SimpleDMOZParser { protected $_stack = array(); protected $_file = ""; protected $_parser = null; protected $_currentId = ""; protected $_current = ""; public function __construct($file) { $this->_file = $file; $this->_parser = xml_parser_create("UTF-8"); xml_set_object($this->_parser, $this); xml_set_element_handler($this->_parser, "startTag", "endTag"); } public function startTag($parser, $name, $attribs) { array_push($this->_stack, $this->_current); if ($name == "TOPIC" && count($attribs)) { $this->_currentId = $attribs["R:ID"]; } if ($name == "LINK" && strpos($this->_currentId, "Top/Home/Consumer_Information/Electronics/") === 0) { echo $attribs["R:RESOURCE"] . "\n"; } $this->_current = $name; } public function endTag($parser, $name) { $this->_current = array_pop($this->_stack); } public function parse() { $fh = fopen($this->_file, "r"); if (!$fh) { die("Epic fail!\n"); } while (!feof($fh)) { $data = fread($fh, 4096); xml_parse($this->_parser, $data, feof($fh)); } } } $parser = new SimpleDMOZParser("content.rdf.u8"); $parser->parse(); </code></pre>
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1. POParsing Huge XML Files in PHP
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1. PTAnswer
UserLastEditorUserId
1. USEmil H
UserOwnerUserId
1. USEmil H
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1. POParsing Huge XML Files in PHP
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1. VO
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2. VO
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CommentsPostId
1. COMost definitely the best answer
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  USEvert
2. COThis is a great answer, but it took me a long time to figure out that you need to use [xml_set_default_handler()](http://php.net/manual/en/function.xml-set-default-handler.php) to access the XML node data, with the above code you can only see the name of the nodes and their attributes.
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  USDirtyBirdNJ

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