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                                    @@ 2007-2009 (lines=3) @@
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                                    | 2004 | 
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                                                $pay_url = add_query_arg( array( 'wpi_action' => 'pay_for_invoice', 'invoice_key' => $key ), $pay_url );  | 
                                
                                                            
                                    | 2005 | 
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                                            }  | 
                                
                                                            
                                    | 2006 | 
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                                              | 
                                
                                                            
                                    | 2007 | 
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                                            if ( $secret ) { | 
                                
                                                            
                                    | 2008 | 
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                                                $pay_url = add_query_arg( array( '_wpipay' => md5( $this->get_user_id() . '::' . $this->get_email() . '::' . $key ) ), $pay_url );  | 
                                
                                                            
                                    | 2009 | 
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                                            }  | 
                                
                                                            
                                    | 2010 | 
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                                    | 2011 | 
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                                            return apply_filters( 'wpinv_get_checkout_payment_url', $pay_url, $this );  | 
                                
                                                            
                                    | 2012 | 
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                                        }  | 
                                
                                                                                
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                                    @@ 2017-2019 (lines=3) @@
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                                    | 2014 | 
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                                        public function get_view_url( $secret = false ) { | 
                                
                                                            
                                    | 2015 | 
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                                            $print_url = get_permalink( $this->ID );  | 
                                
                                                            
                                    | 2016 | 
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                                    | 2017 | 
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                                            if ( $secret ) { | 
                                
                                                            
                                    | 2018 | 
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                                                $print_url = add_query_arg( array( '_wpipay' => md5( $this->get_user_id() . '::' . $this->get_email() . '::' . $this->get_key() ) ), $print_url );  | 
                                
                                                            
                                    | 2019 | 
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                                            }  | 
                                
                                                            
                                    | 2020 | 
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                                    | 2021 | 
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                                            return apply_filters( 'wpinv_get_view_url', $print_url, $this );  | 
                                
                                                            
                                    | 2022 | 
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                                        }  |