Simplified code for container classes in the Laravel framework-excerpted from a book

1<?PHP2 3 //A container class-loaded instance or a callback function that provides an instance4 classContainer {5 6     protected $bindings= [];7 8     //binding interfaces and generating callback functions for corresponding instances9      Public functionBind$abstract,$concrete=NULL,$shared=false) {Ten          One         //if the supplied parameter is not a callback function, the default callback function is generated A         if(!$concreteinstanceof Closure) { -             $concrete=$this->getclosure ($abstract,$concrete); -         } the          -         $this->bindings[$abstract] =Compact(' concrete ', ' shared '); -     } -  +     //callback function for the default build instance -     protected functionGetclosure ($abstract,$concrete) { +          A         return function($c) Use($abstract,$concrete) { at             $method= ($abstract==$concrete) ? ' Build ': ' Make '; -             return $c-$method($concrete); -         }; -          -     } -  in      Public functionMake$abstract) { -         $concrete=$this->getconcrete ($abstract); to  +         if($this->isbuildable ($concrete,$abstract)) { -             $object=$this->build ($concrete); the}Else { *             $object=$this->make ($concrete); $         }Panax Notoginseng          -         return $object; the     } +  A     protected functionIsbuildable ($concrete,$abstract) { the         return $concrete===$abstract||$concreteinstanceof Closure; +     } -  $     //gets the callback function for the binding $     protected functionGetconcrete ($abstract) { -         if(!isset($this->bindings[$abstract])) { -             return $abstract; the         } - Wuyi         return $this->bindings[$abstract[' Concrete ']; the     } -  Wu     //instantiating an object -      Public functionBuild$concrete) { About  $         if($concreteinstanceof Closure) { -             return $concrete($this); -         } -  A         $reflector=NewReflectionclass ($concrete); +         if(!$reflector-isinstantiable ()) { the             Echo $message= "Target [$concrete] is not instantiable "; -         } $  the         $constructor=$reflector-GetConstructor (); the         if(Is_null($constructor)) { the             return New $concrete; the         } -  in         $dependencies=$constructor-getparameters (); the         $instances=$this->getdependencies ($dependencies); the  About         return $reflector->newinstanceargs ($instances); the     } the  the     //resolving dependencies when instantiating objects through a reflection mechanism +     protected functionGetdependencies ($parameters) { -         $dependencies= []; the         foreach($parameters  as $parameter) {Bayi             $dependency=$parameter-getclass (); the             if(Is_null($dependency)) { the                 $dependencies[] =NULL; -}Else { -                 $dependencies[] =$this->resolveclass ($parameter); the             } the         } the  the         return(Array)$dependencies; -     } the  the     protected functionResolveclass (Reflectionparameter$parameter) { the         return $this->make ($parameter->getclass ()name);94     } the  the } the 98  About classTraveller { - 101     protected $trafficTool;102 103      Public function__construct (Visit$trafficTool) {104         $this->traffictool =$trafficTool; the     }106 107      Public functionVisittibet () {108         $this->traffictool->go ();109     } the 111 } the 113 InterfaceVisit { the      Public functiongo (); the } the 117 classTrainImplementsVisit {118 119      Public functionGo () { -         Echo"Go to Tibet by train!!!";121     }122     123 }124  the $app=NewContainer ();126 $app->bind ("Visit", "Train");127 $app->bind ("Traveller", "Traveller"); - 129  the $tra=$app->make ("Traveller");131 $tra->visittibet ();

Simplified code for container classes in the Laravel framework-excerpted from a book