@@ -278,7 +278,7 @@  | 
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| 278 | 278 | * @param string $key to check if it exists in the $_SERVER variable  | 
                                                        
| 279 | 279 | * @param string $default value to return as default  | 
                                                        
| 280 | 280 | *  | 
                                                        
| 281 | - * @return mixed  | 
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| 281 | + * @return string|null  | 
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| 282 | 282 | */  | 
                                                        
| 283 | 283 | public function getServer($key, $default = null)  | 
                                                        
| 284 | 284 |      { |