Some time ago many people were disappointed by the fact that PHP wasn't going to have property accessors , which are a very cool feature and would have helped a lot in reducing boilerplate code in a lot of applications and frameworks. Last October I learned from Lukas Smith about a trick that he used to discover when a public property of an object was being accessed. The trick basically allows to implement property accessors in userland code by exploiting how PHP handles object properties internally. In order to do so, we can use a simple wrapper for our Foo object. Because we want to respect the LSP , we have this wrapper extending Foo :. Weirdly, this will produce something like following:.
Accessing private properties in PHP
Public, private and protected are called access modifiers. The visibility of a property, a method or a constant can be defined by prefixing the declaration with these keywords. Public Access modifier: This modifier is open to use inside as well as outside the class. Protected Access modifier: This modifier is open to use within the class in which it is defined and its parent or inherited classes. Private Access modifier: This modifier is open to use within the class that defines it.
Typed properties in PHP 7.4
If you enjoy reading my blog, you could consider supporting me on Patreon. Typed class properties have been added in PHP 7. These changes are fully opt-in and non breaking to previous versions. In this post we'll look at the feature in-depth, but first let's start by summarising the most important points:.
Private properties can only be accessed by the class that defines the property… right? Actually, PHP has a few ways to circumvent this: reflection, closures and array casting. Of special interest to us is the ReflectionProperty class. Among other things, it has the wonderful method setAccesible.