PHP文件中Require_once的使用示例

<?php
$appcode = 123456;

class Foo {
   public $name = 'FooClass';

   function sayhi() {
        print 'Foo say hello!';
    }
}

$foo = new Foo;

<?php
require_once __DIR__ . '/a.php';
function handler($event, $context) {
    echo $GLOBALS['appcode'] . PHP_EOL;
    $GLOBALS['foo']->sayhi();
    $foo2 = new Foo; 
    $foo2->sayhi();
    return $GLOBALS['appcode'];
}