"parsing extremely large xml files in php" Answer’s

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In PHP, you can read in extreme large XML files with the XMLReaderDocs:

$reader = new XMLReader();
$reader->open($xmlfile);

Extreme large XML files should be stored in a compressed format on disk. At least this makes sense as XML files have a high compression ratio. For example gzipped like large.xml.gz.

PHP supports that quite well with XMLReader via the compression wrappersDocs:

$xmlfile = 'compress.zlib://path/to/large.xml.gz';

$reader = new XMLReader();
$reader->open($xmlfile);

The XMLReader allows you to operate on the current element "only". That means it's forward-only. If you need to keep parser state, you need to build it your own.

I often find it helpful to wrap the basic movements into a set of iterators that know how to operate on XMLReader like iterating through elements or child-elements only. You find this outlined in Parse XML with PHP and XMLReader.

See as well:

  • PHP open gzipped XML
Wednesday, March 31, 2021
 
Besnik
answered 11 Months ago
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