diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/l10n/class-wp-translation-file-php.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/l10n/class-wp-translation-file-php.php	Fri Sep 05 18:40:08 2025 +0200
@@ -0,0 +1,79 @@
+<?php
+/**
+ * I18N: WP_Translation_File_PHP class.
+ *
+ * @package WordPress
+ * @subpackage I18N
+ * @since 6.5.0
+ */
+
+/**
+ * Class WP_Translation_File_PHP.
+ *
+ * @since 6.5.0
+ */
+class WP_Translation_File_PHP extends WP_Translation_File {
+	/**
+	 * Parses the file.
+	 *
+	 * @since 6.5.0
+	 */
+	protected function parse_file() {
+		$this->parsed = true;
+
+		$result = include $this->file;
+		if ( ! $result || ! is_array( $result ) ) {
+			$this->error = 'Invalid data';
+			return;
+		}
+
+		if ( isset( $result['messages'] ) && is_array( $result['messages'] ) ) {
+			foreach ( $result['messages'] as $original => $translation ) {
+				$this->entries[ (string) $original ] = $translation;
+			}
+			unset( $result['messages'] );
+		}
+
+		$this->headers = array_change_key_case( $result );
+	}
+
+	/**
+	 * Exports translation contents as a string.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @return string Translation file contents.
+	 */
+	public function export(): string {
+		$data = array_merge( $this->headers, array( 'messages' => $this->entries ) );
+
+		return '<?php' . PHP_EOL . 'return ' . $this->var_export( $data ) . ';' . PHP_EOL;
+	}
+
+	/**
+	 * Outputs or returns a parsable string representation of a variable.
+	 *
+	 * Like {@see var_export()} but "minified", using short array syntax
+	 * and no newlines.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @param mixed $value The variable you want to export.
+	 * @return string The variable representation.
+	 */
+	private function var_export( $value ): string {
+		if ( ! is_array( $value ) ) {
+			return var_export( $value, true );
+		}
+
+		$entries = array();
+
+		$is_list = array_is_list( $value );
+
+		foreach ( $value as $key => $val ) {
+			$entries[] = $is_list ? $this->var_export( $val ) : var_export( $key, true ) . '=>' . $this->var_export( $val );
+		}
+
+		return '[' . implode( ',', $entries ) . ']';
+	}
+}