how can i get the field of library

[alfredoquintana]

hi, I need to retrieve the fields of a library, and I have this code.

        1 $libraryName = trim($libraryName); // Eliminar espacios en blanco adicionales
        2 $fields = $this->credentials->getWeb()->getLists()->getByTitle($libraryName)->getFields();
        3 $field = $fields->filter("InternalName eq '$nameField'")->top(1)->get()->executeQuery();
        4 if ($field->getCount() == 0) {
            $fieldProperties = new FieldCreationInformation();
            $fieldProperties->Title = $nameField;
            $fieldProperties->FieldTypeKind = FieldType::Text;
           }
        5   $field = $fields->add($fieldProperties);
        6     $credentials->executeQuery();

but when the library is "Documentos compartidos" (Shared Documents), the code its not found.

However, when the library is named "Documentos compartidos" (Shared Documents), the code doesn't work. When I use var_dump on lines 2, 3, and 4, I get nothing. The issue only occurs when $libraryName is set to "Documentos Compartidos" (Shared Documents).
Goodbye for now, I hope you can help me

[alfredoquintana]

Well, as a result, I did it this way. in case it is useful to anyone

   try {
        $field = $credentials->getWeb()->getLists()
            ->getByTitle($libraryName)->getFields()
            ->getByInternalNameOrTitle($fieldName);
        $credentials->load($field);
        $credentials->executeQuery();
        $columnTitle = $field->getTitle(); 
        return $columnTitle;
    } catch (\Exception $e) {
        $fieldProperties = new FieldCreationInformation();
        $fieldProperties->Title = $fieldName;
        $fieldProperties->FieldTypeKind = FieldType::Text;
        $field = $credentials->getWeb()->getLists()->getByTitle($libraryName)
            ->getFields()->add($fieldProperties);
        $credentials->executeQuery();
        return true;
    }