Componere\Abstract\Definition::addTrait

Adding a trait is an efficient way to extend a "final" class, overriding methods and adding new ones, without having to individually add each method as a closure. It also results in more readable code.<?phpdeclare(strict_types=1);/* *  Final class would normally prevent extending. */final class ParentC{    public $parentvar;    public $secondvar;        function __construct() { echo( "\r\n<br/>".$this->parentvar = 'set by '.get_class().'->parentconstruct' ); }    function parentf() { echo( "\r\n<br/>".get_class().'->parentf >> '.$this->parentvar ); }}/* *  Extended class members. */trait ChildC /* extends ParentC */{    function __construct() {        // Call parent constructor.        parent::__construct();        // Access an inherited property set by parent constructor.        echo( "\r\n<br/>".get_class().'->overridden_constructor >> '.$this->parentvar );    }        function parentf() {        // Call overridden parent method.        parent::parentf();        // Access an inherited property set by constructor.        echo( "\r\n<br/>".get_class().'->overridden_parentf >> '.$this->parentvar );    }        function dynamicf( $parm = null ) {        // Populate a parent class property.        $this->secondvar = empty( $parm ) ? 'set by '.get_class().'->dynamicf' : $parm;        // Access an inherited property set by parent constructor.        echo( "\r\n<br/>".get_class().'->dynamicf >> '.$this->parentvar );    }}/* *  Register the dynamic child class "ChildC", which is *  derived by extending "ParentC" with members supplied as "ChildC" trait. */$definition = new \Componere\Definition( 'ChildC', ParentC::class );$definition->addTrait( 'ChildC' );$definition ->register();/* *  Instantiate the dynamic child class, *  and access its own and inherited members. */$dyno = new ChildC;$dyno->parentf();$dyno->dynamicf( 'myvalue ');// Our object is also recognized as instance of parent!var_dump( $dyno instanceof ChildC, $dyno instanceof ParentC, is_a( $dyno, 'ParentC') );var_dump( $dyno );?>will output:set by ParentC->parentconstruct ChildC->overridden_constructor >> set by ParentC->parentconstruct ParentC->parentf >> set by ParentC->parentconstruct ChildC->overridden_parentf >> set by ParentC->parentconstruct ChildC->dynamicf >> set by ParentC->parentconstructboolean trueboolean trueboolean trueobject(ChildC)[2]  public 'parentvar' => string 'set by ParentC->parentconstruct' (length=31)  public 'secondvar' => string 'myvalue ' (length=8)