Bug #74491 [NEW]: XMLWriter adds to many namespace definitions

From: subjective Operating system: PHP version: 7.1.4 Package: XML Writer Bug Type: Bug Bug description:XMLWriter adds to many namespace definitions Description: ------------ XMLWriter adds namespace definitions to any element node that is created by by a namespace aware method. It does not take definitions on parent nodes into account. The resulting XML output is valid and has even the same meaning, but it is a lot larger then needed. Test script: --------------- <?php $_ = new XMLWriter(); $_->openMemory(); $_->setIndent(2); $_->startDocument(); $_->startElementNS('a', 'foo', 'urn:a'); $_->writeElementNS('a', 'bar', 'urn:a', 'foobar'); $_->endElement(); $_->endDocument(); echo $_->outputMemory(); Expected result: ---------------- <?xml version="1.0"?> <a:foo xmlns:a="urn:a"> <a:bar>foobar</a:bar> </a:foo> Actual result: -------------- <?xml version="1.0"?> <a:foo xmlns:a="urn:a"> <a:bar xmlns:a="urn:a">foobar</a:bar> </a:foo> -- Edit bug report at https://bugs.php.net/bug.php?id=74491&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74491&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74491&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74491&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74491&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74491&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74491&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74491&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74491&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74491&r=support Expected behavior: https://bugs.php.net/fix.php?id=74491&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74491&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74491&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74491&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74491&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74491&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74491&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74491&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74491&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74491&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74491&r=mysqlcfg