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                                    @@ 31-35 (lines=5) @@
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                                        public function get($header = null) { | 
                                
                                                            
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                                            if ( is_null($header) ) return $this->headers;  | 
                                
                                                            
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                                            else if ( array_key_exists($header, $this->headers) ) return $this->headers[$header];  | 
                                
                                                            
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                                            else return null;  | 
                                
                                                            
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                                        }  | 
                                
                                                            
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                                    @@ 48-52 (lines=5) @@
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                                                    array_values($this->headers)  | 
                                
                                                            
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                                                );  | 
                                
                                                            
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                                            } else if ( array_key_exists($header, $this->headers) ) { | 
                                
                                                            
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                                                return self::headerToString($header, $this->headers[$header]);  | 
                                
                                                            
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                                            } else return null;  | 
                                
                                                            
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                                        }  | 
                                
                                                            
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                                    @@ 82-92 (lines=11) @@
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                                                return true;  | 
                                
                                                            
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                                            } else if ( array_key_exists($header, $this->headers) ) { | 
                                
                                                            
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                                                unset($this->headers[$header]);  | 
                                
                                                            
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                                                return true;  | 
                                
                                                            
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                                            } else { | 
                                
                                                            
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                                                return false;  | 
                                
                                                            
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                                            }  | 
                                
                                                            
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                                        }  | 
                                
                                                            
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