Bug #79344 [NEW]: XmlWriter::writeAttributeNS produces bad XML with null prefix

From: jtojnar at gmail dot com Operating system: NixOS PHP version: 7.4.3 Package: XML Writer Bug Type: Bug Bug description:XmlWriter::writeAttributeNS produces bad XML with null prefix Description: ------------ When passing a $prefix = null to XMLWriter::writeAttributeNs, it behaves as if empty string was passed, producing a non-well-formed XML document. Same issue happens with startAttributeNS method but it works fine for methods for creating elements. Test script: --------------- <?php $writer = new XMLWriter; $writer->openMemory(); $writer->setIndent(true); $writer->startElement('foo'); $writer->writeAttributeNS(null, 'test', null, 'test'); // $writer->startAttributeNS(null, 'test', null); // $writer->text('test'); // $writer->endAttribute(); $writer->endElement(); echo $writer->outputMemory(); Expected result: ---------------- <foo test="test"/> Actual result: -------------- <foo :test="test"/> -- Edit bug report at https://bugs.php.net/bug.php?id=79344&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79344&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79344&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79344&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79344&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79344&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79344&r=support Expected behavior: https://bugs.php.net/fix.php?id=79344&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79344&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79344&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79344&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79344&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79344&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79344&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79344&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79344&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79344&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79344&r=mysqlcfg