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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	namespace core;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	class Navigation { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		private $navigation;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		private $last_ordre;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		//-------------------------- BUILDER ----------------------------------------------------------------------------//  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public function __construct() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$dbc = App::getDb();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$navigation = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$query = $dbc->select()->from("navigation")->orderBy("ordre")->get(); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if (is_array($query) && (count($query) > 0)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				foreach ($query as $obj) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					if ($obj->ID_page === null) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						$navigation[] = $this->getLienNavigationModule($obj->ID_module);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						$navigation[] = $this->getLienNavigationPage($obj->ID_page);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$last_ordre = $obj->ordre;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$this->last_ordre = $last_ordre;  | 
            
                            
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                				$this->setNavigation($navigation);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		//-------------------------- END BUILDER ----------------------------------------------------------------------------//  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		//-------------------------- GETTER ----------------------------------------------------------------------------//  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public function getNavigation() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			return $this->navigation;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		private function getLienNavigationPage($id_page) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$dbc = App::getDb();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$query = $dbc->select()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->from("navigation") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->from("page") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("navigation.ID_page", "=", "page.ID_page", "AND") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("page.ID_page", "=", $id_page, "AND") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("page.affiche", "=", 1) | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->get();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                View Code Duplication | 
                			if (is_array($query) && (count($query) > 0)) { | 
            
                            
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                				foreach ($query as $obj) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					return [$obj->titre,$obj->url];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		private function getLienNavigationModule($id_module) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$dbc = App::getDb();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$query = $dbc->select()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->from("navigation") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->from("module") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("navigation.ID_module", "=", "module.ID_module", "AND") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("module.ID_module", "=", $id_module, "AND") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("module.installer", "=", 1, "AND") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->where("module.activer", "=", 1) | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				->get();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                View Code Duplication | 
                			if (is_array($query) && (count($query) > 0)) { | 
            
                            
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                				foreach ($query as $obj) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					return [$obj->nom_module,$obj->url];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		//-------------------------- END GETTER ----------------------------------------------------------------------------//  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		//-------------------------- SETTER ----------------------------------------------------------------------------//  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		private function setNavigation($navigation) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$this->navigation = $navigation;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                		public function setTestAjoutLien($id, $value_id, $afficher) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$dbc = App::getDb();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                			if ($afficher != null) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                				$dbc->insert($id, $value_id)->insert("ordre", $this->last_ordre+1)->into("navigation")->set(); | 
            
            
                                                                        
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public function setSupprimerLien($id, $value_id) {echo("$id, $value_id"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$dbc = App::getDb();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$dbc->delete()->from("navigation")->where($id, "=", $value_id)->del(); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                		//-------------------------- END SETTER ----------------------------------------------------------------------------//  | 
            
            
                                                        
            
                                    
            
            
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                	}  | 
            
            
                        
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: