SolrQuery::getFacetPrefix
  (PECL solr >= 0.9.2)
SolrQuery::getFacetPrefix — Returns the facet prefix
  
 
  说明
  
   public SolrQuery::getFacetPrefix(
string $field_override = ?): 
string 
  
  
 
  参数
  
   
    
     field_override 
     - 
      
       The name of the field
      
      
    
   
  
  
 
  返回值
  
Returns a string on success and null if not set.