wp-includes/l10n.php:1681Extracts headers from a PHP translation file.
$php_filestringstring[]function wp_get_l10n_php_file_data( $php_file ) { $data = (array) include $php_file; unset( $data['messages'] ); $headers = array( 'POT-Creation-Date' => 'pot-creation-date', 'PO-Revision-Date' => 'po-revision-date', 'Project-Id-Version' => 'project-id-version', 'X-Generator' => 'x-generator', ); $result = array( 'POT-Creation-Date' => '', 'PO-Revision-Date' => '', 'Project-Id-Version' => '', 'X-Generator' => '', ); foreach ( $headers as $po_header => $php_header ) { if ( isset( $data[ $php_header ] ) ) { $result[ $po_header ] = $data[ $php_header ]; } } return $result;}Introduced in 6.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/l10n.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.