How can differences in PHP versions between a local environment and a server impact the functionality of code, particularly in terms of class declarations and access modifiers?

Differences in PHP versions between a local environment and a server can impact code functionality, especially with class declarations and access modifiers. To address this issue, ensure that the PHP version on the server matches the one used locally. Additionally, double-check that the code is compatible with both PHP versions to prevent any unexpected errors. 

<?php

// Example of class declaration with access modifiers compatible with PHP 5.3 and above
class MyClass {
    public $publicVar;
    protected $protectedVar;
    private $privateVar;

    public function __construct($publicVar, $protectedVar, $privateVar) {
        $this->publicVar = $publicVar;
        $this->protectedVar = $protectedVar;
        $this->privateVar = $privateVar;
    }

    public function getPrivateVar() {
        return $this->privateVar;
    }
}

?>

Keywords

PHP versions local environment server class declarations access modifiers

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