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Php language bad software#
Php language bad code#

They carry state around for the lifetime of the application.

This makes faking them out under test rather difficult in many cases.

Php language bad code#

They inherently cause code to be tightly coupled.

They violate the single responsibility principle: by virtue of the fact that they control their own creation and lifecycle.

Making something global to avoid passing it around is a code smell.

They are generally used as a global instance, why is that so bad? Because you hide the dependencies of your application in your code, instead of exposing them through the interfaces.

⬆ back to top Don't use a Singleton pattern Than the vast majority of other programmers.Īnd now you must use instance of Configuration in your application.

The main point is to avoid common pitfalls like sharing state between objects withoutĪny structure, using mutable data types that can be written to by anything, and notĬentralizing where your side effects occur. Don't have several functions and classes that write to a particularįile. What you want to do is to centralize where Like the previousĮxample, you might need to write to a file. Now, you do need to have side effects in a program on occasion. Some global variable, or accidentally wiring all your money to a stranger. A side effect could be writing to a file, modifying Split out your functions if they are following different code pathsįunction createTempFile( string $name): voidĪ function produces a side effect if it does anything other than take a value in and ⬆ back to top Don't use flags as function parametersįlags tell your user that this function does more than one thing. $ast = $ this-> lexer-> lexify( $tokens)

$tokens = $ this-> tokenizer-> tokenize( $code) Public function parse( string $code): void Public function _construct( Tokenizer $tokenizer, Lexer $lexer) Public function lexify( array $tokens): array Public function tokenize( string $code): array Variables Use meaningful and pronounceable variable names Years of collective experience by the authors of Clean Code.Īlthough many developers still use PHP 5, most of the examples in this article only work with PHP 7.1+.

These are guidelines and nothing more, but they are ones codified over many Not every principle herein has to be strictly followed, and even fewer will be universallyĪgreed upon.

Php language bad software#

Readable, reusable, and refactorable software in PHP. Software engineering principles, from Robert C. Make objects have private/protected members.Functions should only be one level of abstraction.Function arguments (2 or fewer ideally).Use default arguments instead of short circuiting or conditionals.Avoid nesting too deeply and return early (part 2).Avoid nesting too deeply and return early (part 1).

Use the same vocabulary for the same type of variable.Use meaningful and pronounceable variable names.(But the LAMP system is, in general, the fastest though the lesser in hardware. I've been satisfied with both my WAMP and LAMP system, despite vastly different hardware and software differences. So long as its *AMP it's good, Linux servers will, or course, be faster. So, the number of files you include/require slows down the script more than its contents does-especially when fragmented.īy this simple system I've manipulated my own MVC framework to be nearly 10x the speed of a bare-boned CodeIgniter application it's simpler and more minimalist, yes, but it should show that including 1 file, versus 1 per class, can make huge differences in speed. By and large, the worst time-waster in a PHP script is file access. For instance, I can write two queries with nearly identical output but as much as a 2.5x speed increase with the better syntax/choices. (Ironic, I know.) But really, it always depends on how you do what you do that takes the time. Because, really, is the Rubyism of "who cares if it's fast if it scales?" all that wrong? See #2 for an example of what slows you down.Īnything that takes time. The differences are both negligible and flame-bait. Unless you're designing 3d games, of course.