如何解决此错误致命错误：调用未定义函数...？

wp()是非常重要的功能.它驻留在functions.php 文件中(不要与主题中的functions.php 混淆,其他事情),而且我认为您可以在不传递需要该文件的指令.

因此您的安装似乎很破损-内核中的functions.php 文件已损坏,或者其他损坏了,使它跳过了加载该文件的过程.

wp() is quite essential function. It resides in functions.php file (don't confuse with functions.php in theme, different thing) and I don't think you can load WP without passing require directive for that file at some point.

So your install seems very broken - either functions.php file in core is damaged or something else is broken and makes it skip loading that file.

由于某些原因,您的wp-config.php文件可能为空.

Your wp-config.php file might be empty for some reason.

当我迁移到Siteground时,我不知道为什么Siteground将wp-config.php文件最后一行中的包含文件更改为错误的目录.

正确的路径应改为以下路径:

 /* That's all, stop editing! Happy blogging. */
/** Absolute path to the WordPress directory. */
if ( ! defined( 'ABSPATH' ) )
    define( 'ABSPATH', dirname( __FILE__ ) . '/' );

/** Sets up WordPress vars and included files. */
require_once( ABSPATH . 'wp-settings.php' );
 

When I migrated to Siteground, I don't know why Siteground changed the include file in the last line of wp-config.php file to a wrong directory.

The correct path should be this one instead:

/* That's all, stop editing! Happy blogging. */
/** Absolute path to the WordPress directory. */
if ( ! defined( 'ABSPATH' ) )
    define( 'ABSPATH', dirname( __FILE__ ) . '/' );

/** Sets up WordPress vars and included files. */
require_once( ABSPATH . 'wp-settings.php' );

当磁盘空间不足时,使用自动更新可能会导致此问题.如果是这种情况,请释放服务器上的一些空间,然后手动将Wordpress升级到最新版本.

This problem can be caused by using the automatic update when you don't have enough disk space. If that is the case, free up some space on your server, then upgrade Wordpress to the latest version manually.

问题似乎是wp-config.php损坏的结果 我使用数据库凭据更新了本地版本,并通过ftp上传了它,并且有效.

It seems the issue was a result of corrupted wp-config.php I updated the local version with the database credentials and uploaded via ftp and it worked.

有同样的问题.有一个更简单的解决方案:

1. 打开wp-settings.php
2. 注释以下几行(搜索"健康":

     // if ( ! class_exists( 'WP_Site_Health' ) ) {
    //    require_once ABSPATH . 'wp-admin/includes/class-wp-site-health.php';
    // }
    // WP_Site_Health::get_instance();
 

3. 更新所有插件
4. 将wp-settings.php恢复到以前的状态

Had the same issue. Have an easier solution:

1. Open wp-settings.php
2. Comment out the following lines (search for "health":

    // if ( ! class_exists( 'WP_Site_Health' ) ) {
    //    require_once ABSPATH . 'wp-admin/includes/class-wp-site-health.php';
    // }
    // WP_Site_Health::get_instance();

3. Update all your plugins
4. Restore wp-settings.php to the previous state

令人惊讶的...如果您遇到致命错误或致电未定义的功能,请转到您的电子邮件,然后在该电子邮件上您可能会收到来自托管地址的已发送消息...只需重新安装或从该电子邮件页面登录即可...问题将得到解决..

amazing...if you have fatal error or call to undefined funcction jus go to your email and on that email you may have a sent message from your hosting adress...just reinstall or from that email page you log in...problem will be fixed..