What is the difference between PHP functions and Elixir functions?

PHP and Elixir functions differ in definition, type system, parameter passing and return values. PHP function type system is loose, parameters are passed by value or reference, return value type can be specified or omitted, and optional parameters are supported. The Elixir function type system is strongly typed, parameters are passed by value, the return value type must be specified, and pattern matching is used to support multiple return values.

Comparison of PHP and Elixir functions

Both PHP and Elixir are popular programming languages ​​with unique features in function processing . Let’s dive into their differences:

Function Definition

##FeaturesPHPElixir##Syntaxfunction funcName()def funcName doType system

Loose typing	Strong typing

Parameter passing

FeaturesTransmission methodOptional parametersDefault value

PHP	Elixir
By value or reference	By value
Supported	Not supported (Pattern Matching module added later)
Supported	Supported

Return value

FeaturesReturn typeReturn multiple values

PHP	Elixir
Can be specified or omitted	Must be specified
Use array or tuple	Use pattern matching

Practical case

PHP function: Calculate Fibonacci Sequence

<?php
function fibonacci($n) {
  if ($n <= 1) {
    return $n;
  } else {
    return fibonacci($n - 1) + fibonacci($n - 2);
  }
}

Elixir function: Calculate Fibonacci Sequence

defmodule Fibonacci do
  def fib(n) when n in [0, 1], do: n

  def fib(n) do
    fib(n - 1) + fib(n - 2)
  end
end

Analysis

PHP functions return a floating point value, while Elixir functions return an integer value. Elixir functions use

when

statements for pattern matching, providing more concise and elegant code. PHP functions can use optional parameters, and Elixir functions require the pattern matching module to support them.

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