first commit

wp-content/plugins/polylang/integrations/custom-field-template/cft.php

@@ -0,0 +1,35 @@
+<?php
+/**
+ * @package Polylang
+ */
+
+/**
+ * Manages the compatibility with Custom Field Template.
+ *
+ * @since 2.8
+ */
+class PLL_Cft {
+	/**
+	 * Setups actions.
+	 *
+	 * @since 2.8
+	 */
+	public function init() {
+		add_action( 'add_meta_boxes', array( $this, 'cft_copy' ), 10, 2 );
+	}
+
+	/**
+	 * Custom field template does check $_REQUEST['post'] to populate the custom fields values.
+	 *
+	 * @since 1.0.2
+	 *
+	 * @param string  $post_type Unused.
+	 * @param WP_Post $post      Current post object.
+	 */
+	public function cft_copy( $post_type, $post ) {
+		global $custom_field_template;
+		if ( isset( $custom_field_template, $_REQUEST['from_post'], $_REQUEST['new_lang'] ) && ! empty( $post ) ) { // phpcs:ignore WordPress.Security.NonceVerification
+			$_REQUEST['post'] = $post->ID;
+		}
+	}
+}

wp-content/plugins/polylang/integrations/custom-field-template/load.php

@@ -0,0 +1,21 @@
+<?php
+/**
+ * Loads the integration with Custom Field Template.
+ *
+ * @package Polylang
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Don't access directly.
+};
+
+add_action(
+	'plugins_loaded',
+	function() {
+		if ( class_exists( 'custom_field_template' ) ) {
+			PLL_Integrations::instance()->cft = new PLL_Cft();
+			PLL_Integrations::instance()->cft->init();
+		}
+	},
+	0
+);