Türker Yıldırım

php

  • Methods on an enum replace a match in six places

    Note2 min read

    The same match over order status appeared in a controller, two Blade templates, a mailer and an exporter, and adding a case updated four of the five. Moving…

  • A readonly array is not deeply immutable

    Note2 min read

    readonly prevents reassignment of the property and says nothing about what the property points at, which is obvious for objects and surprising for arrays. The array case works…

  • final on a class constant, which was previously impossible

    Note2 min read

    A class constant could always be overridden by a subclass, silently, and there was no way to say it should not be. This matters most for a constant…

  • An enum can implement an interface but cannot extend

    Note2 min read

    Enums are final, cannot extend anything and cannot be extended, which removes a set of designs that class constants had allowed. Implementing an interface is what makes an…

  • readonly locks on first write, not at construction

    Note2 min read

    A readonly property is not initialised-at-declaration; it is write-once from inside the declaring class, and the difference decides what a wither method can do. The property has no…

  • never is not void, and the analyser knows

    Note2 min read

    void means the function returns nothing and never means it does not return, and the second is information a static analyser can act on. The practical value is…

  • Enums, and the string column that was pretending

    Deep dive16 min read

    8.1 on 25 November, and the feature PHP had been simulating with class constants for a decade. A status column holding three spellings of the same thing.

  • Serialising an object with readonly properties

    Note2 min read

    unserialize creates an object without calling the constructor and then writes the properties, which is precisely the thing readonly forbids. Native serialisation is allowed by an explicit carve-out…

  • from() throws and tryFrom() returns null

    Note2 min read

    Hydrating an enum from a request parameter with from() produced an uncaught ValueError on the first malformed input, which was about nine minutes after deploy. The two methods…

  • __set on a class that declares the property does nothing

    Note2 min read

    __set is only called for inaccessible or undefined properties, so declaring the property you meant to intercept disables the magic silently. The private case is the one that…