[TinyMCE] class-wp-editor.php is emitting open_basedir restriction warning when using my own error handler

[arnolp]

My server has open basedir restrictions.

When editing a post on classical editor, on line 530, class-wp-editor checks for translations loaded for external TinyMCE 3.x plugins.

 if ( @is_file( $path . 'en_dlg.js' ) ) { ..

On standard case , "@"supress the errors as it should.

But I have, as many users, my own error handling for pushing error logs in external collector.
So "supress errors" @ seems to be non-effective;
and my logs are full of these :

"is_file(): open_basedir restriction in effect. File(/en_dlg.js) is not within the allowed path(s): (..) /wp/wp-includes/class-wp-editor.php","error_line":530

The correct way to check a potential outside of openbasedir restriction seems to be

 // Default error handler is required
    set_error_handler(null);

    // Clean last error info. You can do it using error_clean_last in PHP 7.
    @trigger_error('__clean_error_info');

    // Testing...
    @file_exists($path);

    // Restore previous error handler
    restore_error_handler();

as to why '$path' seems to be '/' ,thus checking file at server root, I have no clue ..

[hellofromTonya]

Hello @arnolp,

Welcome to WordPress Core's Trac!

I'm updating the Version number from trunk (which would mean 6.2.0) to 3.9.0 which is when this code. Why? This specific code was introduced into Core via [27922] / #27610.