Constants can be accessed from anywhere in a script without regard to scope. For more information on scope, read the manual section on variable scope. Note: As of PHP 7.1.0, class …

Jul 23, 2025 · PHP Constants: PHP Constants are the identifiers that remain the same. Usually, it does not change during the execution of the script. They are case-sensitive. By default, …

PHP Constants Constants are like variables, except that once they are defined they cannot be changed or undefined. PHP constants can be defined with the define() function or the const …

Jul 4, 2025 · PHP Constants: In-Depth Guide A PHP constant is a name for a simple value. Unlike variables, we cannot change constants while running the script. The characteristics of …

Learn everything about PHP variables and constants — syntax, rules, examples, and differences. Master how to store and manage data in PHP

Jan 18, 2025 · In conclusion, understanding variables and constants is fundamental to mastering PHP programming. Variables offer flexibility and adaptability, allowing developers to store and …

Aug 4, 2025 · Constants in PHP are identifiers that represent fixed values that cannot be changed during script execution. Unlike variables, once a constant is defined, its value cannot be …

Unlike variables, a constant is not prepended with a $. It is also possible to use the constant () function to read a constant's value if the constant's name is obtained dynamically.