SolrDocument::__isset
  (PECL solr >= 0.9.2)
SolrDocument::__isset — Checks if a field exists
  
 
  Description
  
   public SolrDocument::__isset(
string $fieldName): 
bool 
  
 
  
 
  Parameters
  
   
    
     fieldName 
     - 
      
       Name of the field.
      
      
    
   
  
  
 
  Return Values
  
   Returns true on success or false on failure.