Where to add functions in php

Where should the function be added in php?

If you want to execute the script when the page is loaded, you can put Put it in the function.

Functions are executed by calling functions.

You can call functions anywhere on the page.

Creating PHP functions

Functions are executed by calling functions.

Syntax

<?php
function functionName()
{
    // 要执行的代码
}
?>

PHP function guidelines:

The name of the function should indicate its function

The function name starts with a letter or Starts with an underscore (cannot start with a number)

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