wp-admin/includes/misc.php:986Saves the XML document into a file.
$docDOMDocument$filenamestringfunction saveDomDocument( $doc, $filename ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid $config = $doc->saveXML(); $config = preg_replace( "/([^\r])\n/", "$1\r\n", $config ); $fp = fopen( $filename, 'w' ); fwrite( $fp, $config ); fclose( $fp );}Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/misc.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.