Question

我想使用stdClass来存储某些方法的选项，而不是传递巨大的变量列表（受javascript风格编码的启发）

但是，我想确保我总是将stdClass的实例作为参数。我知道我可以在参数中添加一个提示（gb :: search下面）但是当我故意试图打破它时，我不确定如何处理错误。

任何提示？

class gb extends CI_Model {


protected $searchtypes = array('full','partial');
protected $endpoint = "https://local.endpoint";

function __construct() {
    parent::__construct();

    // sample search
    $options = new stdClass();

    $options->term = 'sample search';
    $options->type = 'full';

    $this->search($options);

}

function clean_term($term){
    $term = trim($term);
    return $term;
}

function search(stdClass $options){

    $term = $options->term;
    $type = $options->type;

    // make sure we're doing a valid search
    if (!$term || !in_array($type, $this->searchtypes)) {
        return false;
    }

    $term = $this->clean_term($term); // etc




}

它抛出的错误类似于：

A PHP Error was encountered

Severity: 4096

Message: Argument 1 passed to gb::search() must be an instance of stdClass, null given, called in /application/models/gb.php on line 20 and defined

Filename: models/gb.php

Line Number: 29
A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: models/gb.php

Line Number: 31
A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: models/gb.php

Line Number: 32

如何从CodeIgniter的角度来看待这个问题？

Answer 1

如果我记得 - 错误输入的参数应该引发E_RECOVERABLE_ERROR，那么，它会触发错误处理程序但执行仍在继续。所以，你基本上有两种选择。

一种是在遇到E_RECOVERABLE_ERROR时在错误处理程序中抛出异常。停止执行。

另一个 - 使用instanceof stdClass检查类型并执行您认为的操作 - 引发异常或返回异常。

UPDATE 在您的情况下，您的框架（CI是针对CodeIgniter？）设置错误处理程序（使用set_error_handler的某处）。因此，在记录或打印错误消息后继续执行。（如果没有处理程序，你会得到致命的错误）。只需手动测试参数类型：

function search(stdClass $options){
  // test type for sure, because of recoverable error
  if (!($options instanceof stdClass)) {
    return false; // or throw new InvalidArgumentException('Parameter should be instance of stdClass');
  }

  $term = $options->term;
  $type = $options->type;

  // make sure we're doing a valid search
  if (!$term || !in_array($type, $this->searchtypes)) {
    return false;
  }

  $term = $this->clean_term($term); // etc
}

在这种情况下如何处理错误的参数类型？

1 个答案: