diff --git a/language/oop5/decon.xml b/language/oop5/decon.xml index 5b274b4e87..38f680e9ab 100644 --- a/language/oop5/decon.xml +++ b/language/oop5/decon.xml @@ -1,92 +1,93 @@ - + Constructors and Destructors + - Constructor - - PHP 5 allows developers to declare constructor methods for classes. - Classes which have a constructor method call this method on each - newly-created object, so it is suitable for any initialization that the - object may need before it is used. - - - - Parent constructors are not called implicitly. In order to run - a parent constructor, a call to - parent::__construct is required. - - - - using new unified constructors - + Constructor + + PHP 5 allows developers to declare constructor methods for classes. + Classes which have a constructor method call this method on each + newly-created object, so it is suitable for any initialization that the + object may need before it is used. + + + + Parent constructors are not called implicitly. In order to run + a parent constructor, a call to + parent::__construct is required. + + + + using new unified constructors + ]]> - - - - For backwards compatibility, if PHP 5 cannot find a - __construct function for a given class, it will - search for the old-style constructor function, by the name of the class. - Effectively, it means that the only case that would have compatibility - issues is if the class had a method named - __construct which was used for different semantics. - + + + + For backwards compatibility, if PHP 5 cannot find a + __construct function for a given class, it will + search for the old-style constructor function, by the name of the class. + Effectively, it means that the only case that would have compatibility + issues is if the class had a method named + __construct which was used for different semantics. + - Destructor - - PHP 5 introduces a destructor concept similar to that of other - object-oriented languages, such as Java: When the last reference to an - object is destroyed the object's destructor, which is a class method - named __destruct that receives no parameters, is - called before the object is freed from memory. - - - Destructor Example - + Destructor + + PHP 5 introduces a destructor concept similar to that of other + object-oriented languages, such as Java: When the last reference to an + object is destroyed the object's destructor, which is a class method + named __destruct that receives no parameters, is + called before the object is freed from memory. + + + Destructor Example + name = "MyDestructableClass"; - } + function __construct() { + print "In constructor\n"; + $this->name = "MyDestructableClass"; + } - function __destruct() { - print "Destroying " . $this->name . "\n"; - } + function __destruct() { + print "Destroying " . $this->name . "\n"; + } } $obj = new MyDestructableClass(); ?> ]]> - - - - Like constructors, parent destructors will not be called implicitly by - the engine. In order to run a parent destructor, one would have to - explicitly call parent::__destruct in the destructor - body. - + + + + Like constructors, parent destructors will not be called implicitly by + the engine. In order to run a parent destructor, one would have to + explicitly call parent::__destruct in the destructor + body. +