wp-includes/l10n/class-wp-translation-file-php.php:47Exports translation contents as a string.
string public function export(): string { $data = array_merge( $this->headers, array( 'messages' => $this->entries ) ); return '<?php' . PHP_EOL . 'return ' . $this->var_export( $data ) . ';' . PHP_EOL; }Introduced in 6.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/l10n/class-wp-translation-file-php.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.