Advanced Custom Fields – 致命错误：Uncaught TypeError: Illegal offset type in isset or empty in…

问题概述

使用 Advanced Custom Fields 插件时可能会出现以下致命错误。该错误特别在使用 PHP 8 或更高版本时出现：

Fatal error: Uncaught TypeError: Illegal offset type in isset or empty in .../wp-content/plugins/sitepress-multilingual-cms/classes/core-abstract-classes/class-wpml-element-translation.php:259

临时解决方法

在继续操作之前，请确保对您的站点进行完整备份。

• 打开 …/wp-content/plugins/acfml/classes/class-wpml-acf-attachments.php 文件。
• 找到第 28 行。
• 替换：

  foreach ( $attachments as $key => $attachment_id ) {
  		$translated_attachments[ $key ] = apply_filters( 'wpml_object_id', $attachment_id, 'attachment', true );

• 替换为：

  foreach ( $attachments as $key => $attachment_id ) {
  	if (is_int($attachment_id)) {
  		$translated_attachments[ $key ] = apply_filters( 'wpml_object_id', $attachment_id, 'attachment', true );
  	}

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