WPML 4.7 Conflict with Plugins Using PSR/Log 3.0 Causes Fatal Error in WP-CLI

Open

Reported for: WPML Multilingual CMS 4.7.0

Topic Tags: Bug

Overview of the issue

WPML 4.7 has a compatibility issue with plugins that use PSR/Log 3.0, such as Rollbar. When WPML and Rollbar are both active, running WP-CLI commands (e.g., wp --info) triggers a fatal error due to method signature mismatches in the DebugFileLogger class.

PHP Fatal error:  Declaration of WPML\\PHP\\Logger\\DebugFileLogger::log($level, $message, array $context = []) must be compatible with Psr\\Log\\AbstractLogger::log($level, Stringable|string $message, array $context = []): void in ...\\wp-content\\plugins\\sitepress-multilingual-cms\\vendor\\wpml\\wpml\\lib\\Php\\Logger\\DebugFileLogger.php on line 8

Workaround

Please, make sure of having a full site backup of your site before proceeding.

Open …/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/wpml/lib/Php/Logger/DebugFileLogger.php file.

Replace:

namespace WPML\PHP\Logger;
 
class DebugFileLogger extends \Psr\Log\AbstractLogger {
 
 
  public function log( $level, $message, array $context = array() ) {
    if ( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) {
      return;
    }
 
    $log = date( 'Y-m-d H:i:s' ) . ' [' . $level . '] ' . $message . PHP_EOL;
    \error_log( $log );
  }
 
 
}

With:

namespace WPML\PHP\Logger;
 
use Psr\Log\AbstractLogger;
use Stringable;
 
class DebugFileLogger extends AbstractLogger {
 
  public function log($level, $message, array $context = []): void {
    if ( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) {
      return;
    }
 
    $log = date( 'Y-m-d H:i:s' ) . ' [' . $level . '] ' . (string) $message . PHP_EOL;
    \error_log( $log );
  }
 
}

5 所有回复给 “WPML 4.7 Conflict with Plugins Using PSR/Log 3.0 Causes Fatal Error in WP-CLI”

justinV-10 说：

13 2 月, 2025 at 8:16 下午

It seems to me this error is not only limited to WP-CLI. If there already is a fix i would appreciate a patch release since this currently breaks some of our pages.

回覆
- Andrés 说：
  
  14 2 月, 2025 at 6:09 上午
  
  Hello there,
  If you can reproduce this error in a different way, we would appreciate if you can share the steps to reproduce it. In that way we will be able to check if there are other cases that need to be covered. Furthermore, if the workaround here provided doesn’t help, you can start a chat in our support forum.
  
  回覆
Luc Laverdure 说：

17 2 月, 2025 at 9:04 下午

This worked for me:

namespace WPML\PHP\Logger; class DebugFileLogger extends \Psr\Log\AbstractLogger { public function log( $level, $message, array $context = array() ) : void { if ( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) { return; } $log = date( 'Y-m-d H:i:s' ) . ' [' . $level . '] ' . $message . PHP_EOL; \error_log( $log ); } }

回覆
- Nicolas V. 说：
  
  18 2 月, 2025 at 2:21 下午
  
  Hi Luc,
  
  Thanks for sharing your workaround! I’ll pass it along to our developers for their feedback.
  
  回覆
- Nicolas V. 说：
  
  18 2 月, 2025 at 2:59 下午
  
  Hi Again Luc,
  
  Thanks for your comment! We’ve updated the workaround to ensure the syntax is compatible with PHP 7.1 and later.
  
  回覆