Functions are reusable code blocks that only execute when called. They allow the code to be divided into smaller parts that are easier to understand and reuse.
To create a function , the function keyword is used, followed by a name, a set of parentheses, and a code block. The naming convention1 for functions is the same as for variables—to use a descriptive name with each word initially capitalized, except for the first one.
echo 'Hello World';
A function code block can contain any valid PHP code, including other function definitions.
Once defined, ...