Classes

Installation

composer require phputil/di

Example 1: automatic injection without configuring anything

class A {}class B {}class C {public$a,$b;function__construct(A$a,B$b ) {$this->a =$a;$this->b =$b;}}// Automatically creates "A" and "B", and inject them in "C"$c =DI::create('C' );

Example 2: configuring the injection for interfaces

interface MyInterface {functionsay($what );}class MyClassimplements MyInterface {functionsay($what ) {echo$what; }}// Configures "MyInterface" to be created using "MyClass"DI::config(DI::let('MyInterface' )->create('MyClass' ) );$foo =DI::create('MyClass' );// Create an instance of MyClass (no configuration required)$foo->say('hello' );$bar =DI::create('MyInterface' );// Create an instance of MyClass!$bar->say('world' );

Example 3: a more complex model

interface I {}class A {}class Bimplements I {}class C {public$i;function__construct(I$i ) {$this->i =$i;}}class X {public$a,$c;function__construct(A$a,C$c ) {$this->a =$a;$this->c =$c;}}// Configures "I" to be created using "B"DI::config(DI::let('I' )->create('B' ) );// Automatically creates and injects "A" and "C", and// when creates "C", also injects "B" as "I".$x =DI::create('X' );

Example 4: passing constructor's arguments

class A {function__construct($one,$two ='world' ) {echo$one,',',$two;}}// Creates "A", passing constructor arguments as an array$a =DI::create('A',array('hello' ) );// prints hello, world

Example 5: configuring shared instances

class A {}// Makes "A" a shared instanceDI::config(DI::let('A' )->shared() );$a1 =DI::create('A' );$a2 =DI::create('A' );var_dump($a1 ===$a2 );// bool(true)

Example 6: configuring shared instances for interfaces

interface I {}class Cimplements I {}// Makes "I" a shared instanceDI::config(DI::let('I' )->create('C' )->shared() );$i1 =DI::create('I' );$i2 =DI::create('I' );var_dump($i1 ===$i2 );// bool(true)

Example 7: defining a creation function

interface I {}class Cimplements I {}// Let you using a callable to create the desired instanceDI::config(DI::let('I' )->call(function() {returnnewC();} ) );$i =DI::create('I' );// Calls your function to create a "C" instance

Example 8: passing arguments for creation functions

class A {private$text;function__construct($text ) {$this->text =$text;}}// Lets you customize a callable with parametersDI::config(DI::let('A' )->call(function($a,$b ) {returnnewA($a .$b );} ) );// Uses the customized constructor$a =DI::create('A',array('Hello,','world' ) );echo$a->text();// Hello, world// Ignore the customized constructor passing true after the parameters$a2 =DI::create('A',array('Hi!' ),true );echo$a2->text();// Hi