---
title: "Constant Scalar Expressions In PHP"
url: https://www.exakat.io/constant-scalar-expressions-in-php/
date: 2026-07-20
modified: 2026-07-20
author: "dams"
description: "Constant Scalar Expressions In PHP Constants are the immovable rocks of a PHP application. Once defined, they never change. Yet, since PHP 5.6, those rocks may be carved with expressions...."
categories:
  - "Code auditing"
tags:
  - "php"
  - "static constant expression"
image: https://www.exakat.io/wp-content/uploads/2026/07/shop.320.jpg
word_count: 58
---

# Constant Scalar Expressions In PHP

[![Constant Scalar Expressions In PHP](https://www.exakat.io/wp-content/uploads/2026/07/shop.320-300x300.jpg)](https://www.exakat.io/wp-content/uploads/2026/07/shop.320.jpg)
# Constant Scalar Expressions In PHP

Constants are the immovable rocks of a PHP application. Once defined, they never change. Yet, since PHP 5.6, those rocks may be carved with expressions. This is the realm of constant scalar expressions, where PHP allows a little bit of calculation in a place that was, for a long time, strictly literal.