How can define a function in a PHP?

[andrepitt77]

Today PHP is the most useful language for development but how can i define a function in PHP? If you know than please reply me.

[lokeshm]

andrepitt77

Generally we create function.
I am not sure if you are referring to creating function or you are specifically asking about Defining a function.

We create function in PHP as shown here below

function somename($optional_arg1, $optional_arg2) {
//Do something
$result = $optional_arg1 + $optional_arg2;
return ($result);
}


PHP also has DEFINE function which is used to define a constant.

Example
define(DB_NAME,"testdb_blogs");

Once a constant is defined, it can be used anywhere.
Generally define function is used in config files from where admin can set / reset various constant values.

Regards,
Lokesh M.