wp-includes/pomo/po.php:69Exports the whole PO file as a string
$include_headersbooloptionaltruestring public function export( $include_headers = true ) { $res = ''; if ( $include_headers ) { $res .= $this->export_headers(); $res .= "\n\n"; } $res .= $this->export_entries(); return $res; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/pomo/po.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.