Global PHP Constants | PHP Gurukul
What is PHP Constants? Constants are variables Constants are variables except that once they are defined they can’t be changed or undefined. A constant is an identifier (name) for a simple value. The value cannot be changed during the script. A valid constant name starts with a letter or underscore. ( no $ sign before the constant name). Note: Unlike variables, constants are automatically global across the entire script. How to create a PHP constant You can create a constant by using the define () function. Use the define function to specify the name and value of a constant. (name, value, case-insensitive). Many programmers use capital letters to name constants – so they stand out. Note: Since a constant can not be change you do not use a $ sign before it’s name when you declare it or (use it). Parameters name : Specifies the name of the constant value : Specifies the value of the constant case-insensitive : Specifies whether the constant name...