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Demonstrates a PHP bug: It is possible to directly call the magic method "__construct".
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| <?php | |
| /** | |
| * DirectCallToMagicMethodConstruct.php | |
| * | |
| * PHP 5.4.13 (cli) (built: Mar 15 2013 02:05:59) | |
| * Copyright (c) 1997-2013 The PHP Group | |
| * Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies | |
| * with Xdebug v2.2.1, Copyright (c) 2002-2012, by Derick Rethans | |
| */ | |
| class ParentClass | |
| { | |
| function __construct() | |
| { | |
| echo __METHOD__, \PHP_EOL; | |
| } | |
| } | |
| class ChildClass extends ParentClass | |
| { | |
| function __construct() | |
| { | |
| echo __METHOD__, \PHP_EOL; | |
| // The following call would result in endless recursion. | |
| // $this->__construct(); | |
| // Accessing the superclass is possible via the special name "parent". | |
| // There is not distinction between member methods and static methods! | |
| parent::__construct(); | |
| } | |
| } | |
| // The "new" operator is used to create a new instance. This invokes the magic method "__construct". | |
| $example = new ChildClass; | |
| // The "clone" operator is used to create a shallow copy of an object. | |
| $clonedExample = clone $example; | |
| // The following call would result in an \E_FATAL: Cannot call __clone() method on objects - use 'clone $obj' instead in [...] on line 40 | |
| //$example->__clone(); | |
| // Should raise an \E_FATAL with the following message: | |
| // "Cannot call __construct() method on objects - use 'new <Class>' instead in [...] on line 21" | |
| $example->__construct(); | |
| // ... but does not! | |
| // Question: Why is the behaviour different? |
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