Log all WP_Error calls, when WP_ENV = 'development' (#557)

Create errors.php

public/app/mu-plugins/errors.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * Errors
+ * Only allowed in development environment.
+ */
+
+defined('ABSPATH') || exit;
+
+if (getenv('WP_ENV') !== 'development') {
+    return;
+}
+
+/**
+ * wp_error_added
+ * When WP_Error is called, it is up to the developer to access and handle the error, they are not logged by default.
+ * This action/function ensures that any errors added to WP_Error will be logged immediately.
+ */
+
+add_action('wp_error_added', function (string|int $code, string $message, mixed $data, WP_Error $wp_error) {
+    if (is_array($message) || is_object($message)) {
+        error_log("Error code: $code. Message: " . print_r($message, true));
+    } else {
+        error_log("Error code: $code. Message:  $message");
+    }
+}, 10, 4);