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Informations about the package lazy-property

Lazy Property

This small library aims at providing a very simple and efficient loading of lazy properties

Latest Stable Version Latest Unstable Version

Abandoned

Starting with PHP 8.3, dynamic properties are no longer allowed "out of the box". While it is still possible to have dynamic properties via explicit declaration (the #[\AllowDynamicProperties] attribute), the approach of this package is no longer to be considered safe nor efficient long-term.

Based on that, this package is deprecated and abandoned: please use traditional PHP arrays instead.

Installation

The suggested installation method is via composer:

Use case

In many cases where lazy-initialization of private/protected properties is necessary, many people write classes that look like following:

This is problematic because implementors and people subclassing SomeService will eventually write:

This can work only if SomeService#getDependency() was called at least once upfront (which may well be under certain circumstances), and therefore is a cause of bugs/headaches/suicides/etc.

In order to avoid this problem, the implementor of SomeService that is also exposing its protected $dependency property may just use LazyProperty\LazyPropertiesTrait to fix the problem:

With this, any access to SomeService#$dependency will cause a call to SomeService#getDependency() if the property was not already initialized.

Please note that a getter is required in order for the property to be lazy.

Performance notes

Using LazyProperty\LazyPropertiesTrait allows to speed up applications where a massive amount of getter calls is going on in private/protected scope. There is some minor overhead in calling SomeService#initLazyProperties(), as well as in the first property access, but it should be negligible.

All versions of lazy-property with dependencies

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Requires php Version ~8.1.0 || ~8.2.0
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