Batch over current working directory using XMLlint to ensure well formed XML document

xmllint-dir-wellformed.sh

# Batch over current working directory using XMLlint to ensure well formed XML document. --schema for.xsd
find . -name "*.xml" -type f | xargs xmllint --noout

# Batch over current working directory using XMLlint and repair malformed XML docs
find . -name "*.xml" -type f | xmllint --format --recover --noout --output 

# Single file check:
xmllint --noout <file.xml>

# Fix malformed XML in PHP
$xml = new DomDocument();
$xml->recover=true;
$xml->loadXML('<root><tag>hello world</root>');
echo $xml->saveXML();