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<?php $writer = new XMLWriter(); $writer->openMemory(); $writer->startElement("tag-(with)-brackets"); $writer->endElement(); var_dump($writer->outputMemory());
based on dgHCD
Output for 8.0.0
Fatal error: Uncaught ValueError: XMLWriter::startElement(): Argument #2 must be a valid element name, "tag-(with)-brackets" given in /in/OurBC:5 Stack trace: #0 /in/OurBC(5): XMLWriter->startElement('tag-(with)-brac...') #1 {main} thrown in /in/OurBC on line 5
Process exited with code 255.
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.24, 7.4.0 - 7.4.13
Warning: XMLWriter::startElement(): Invalid Element Name in /in/OurBC on line 5 string(0) ""