What are best practices for passing variables to PHP classes?

When passing variables to PHP classes, it is recommended to use constructor injection to ensure that the class has all the necessary dependencies when it is instantiated. This helps in keeping the class decoupled and makes it easier to test and reuse. Additionally, defining class properties and setting them using setter methods can also be a good practice for passing variables to classes. 

<?php

class MyClass {
    private $variable;

    public function __construct($variable) {
        $this->variable = $variable;
    }

    public function getVariable() {
        return $this->variable;
    }

    public function setVariable($variable) {
        $this->variable = $variable;
    }
}

// Instantiate the class and pass a variable
$myClass = new MyClass('Hello, World!');

// Get the variable value
echo $myClass->getVariable();

?>

Keywords

dependency injection constructor static method type hinting private properties

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