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让我们以Hello World为例,首先创建一个简单的控制器。使用你的文本编辑器,创建一个叫做 tools.php 的文件,并且输入如下代码:

复制代码 代码如下:
class Tools extends CI_Controller {

  public function message($to = 'World')
  {
    echo "Hello {$to}!".PHP_EOL;
  }
}
?>

然后将这个文件保存到你的 application/controllers/ 文件夹里。现在正常情况下你可以通过你网站的 URL 来访问它:

复制代码 代码如下:
example.com/index.php/tools/message/to

除此之外,我们也可以在 Mac/Linux 中打开终端,或者在 Windows 下进入“运行”输入“cmd”,并进入我们的 CodeIgniter 项目的目录。

复制代码 代码如下:
$ cd /path/to/project;
$ php index.php tools message

如果你跟这样一步步运行下来,应该会看到 Hello World!。

复制代码 代码如下:
$ php index.php tools message "John Smith"

至此我们像使用 URL 参数一样给它传递了一个参数。“John Smith”作为一个参数被传递了,并且输出也变成:Hello John Smith!。

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