Difference between revisions of "ObjectsAndRefs"
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! colspan="2" style="text-align: left" | The above code creates a new class, SimpleClass, with no properties or methods. It then creates a new instance of this class | ! colspan="2" style="text-align: left" | The above code creates a new class, SimpleClass, with no properties or methods. It then creates a new instance of this class | ||
| − | + | and attaches it to the variable named '$instance'. | |
Because objects are "special" <ref>Sara Golemon, "You're Being Lied To" [http://blog.golemon.com/2007/01/youre-being-lied-to.html]</ref> in PHP5, the relationship between the variable '$instance' and the object inside it is not as direct as you might be expecting... | Because objects are "special" <ref>Sara Golemon, "You're Being Lied To" [http://blog.golemon.com/2007/01/youre-being-lied-to.html]</ref> in PHP5, the relationship between the variable '$instance' and the object inside it is not as direct as you might be expecting... | ||
Revision as of 22:55, 26 July 2011
This page attempts to provide a visual guide to how objects - and references to them - work in PHP 5.0 and later.
| class SimpleClass { public $var = 'a default value'; } $instance = new SimpleClass(); |
|
| The above code creates a new class, SimpleClass, with no properties or methods. It then creates a new instance of this class
and attaches it to the variable named '$instance'. Because objects are "special" [1] in PHP5, the relationship between the variable '$instance' and the object inside it is not as direct as you might be expecting... | |
|---|---|
| $assigned = $instance; | 
|
| Explain the sample... | |
| $instance->var = '$assigned will have this value as well'; | 
|
| Explain the sample... | |
| $reference =& $instance; | 
|
| Explain the sample... | |
| $instance = null; | 
|
| Explain the sample... | |
