Similar to other programming languages, PHP provides a way for programmers to define functions, which can then be called elsewhere in the program. The syntax for a function is:
function "function_name" (arg1, arg2...)
{
[code to execute]
return [final_result];
}
where [final_result] is typically the variable holding the final value to be returned from the function.
Let's take a look at an example:
| function double_this_number($input_number) { return $input_number*2; } |
| $x = 10; $y = double_this_number($x); print $y; |
| 20 |
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