我如何处理警告:SimpleXMLElement::__construct()? [英] How do I handle Warning: SimpleXMLElement::__construct()?

问题描述

我在本地主机上运行时遇到此错误，如果 Internet 断开连接(如果 Internet 连接正常)我想处理此错误，错误可以显示"但想处理 PHP 上的非致​​命错误中断页面.

I'm getting this error when I run in local host, if internet is disconnected (if internet is connect its ok) I want to handle this error, "error can show " but want to handle not fatal error break on PHP page.

Warning: SimpleXMLElement::__construct() [simplexmlelement.--construct]:
  php_network_getaddresses: getaddrinfo failed: No such host is known.
  in F:\xampp\htdocs\shoptpoint\sections\docType_head_index.php on line 30

但我正在尝试使用 try-catch 进行处理.下面是我的代码

but I'm trying to handle using try-catch. Below is my code

$apiurl="http://publisher.usb.api.shopping.com/publisher/3.0/rest/GeneralSearch?apiKey=78b0db8a-0ee1-4939-a2f9-d3cd95ec0fcc&trackingId=7000610&categoryId='5855855'";

try{
  new SimpleXMLElement($apiurl,null, true);
}catch(Exception $e){
  echo $e->getMessage();
}

我如何处理错误并且我的页面可以在项目结束时执行?

How do I handle the error and my page can execute end of the project?

推荐答案

使用 set_error_handler，您可以执行以下操作，将 SimpleXMLElement 引发的任何通知/警告转换为可捕获的异常.

Using set_error_handler, you can do the following to convert any notices/warnings raised by SimpleXMLElement into a catchable Exception.

采取以下措施:-

<?php
function getData() {
    return new SimpleXMLElement('http://10.0.1.1', null, true);
}

$xml = getData();

/*
    PHP Warning:  SimpleXMLElement::__construct(http://10.0.1.1): failed to open stream: Operation timed out
    PHP Warning:  SimpleXMLElement::__construct(): I/O warning : failed to load external entity "http://10.0.1.1"
    PHP Fatal error:  Uncaught exception 'Exception' with message 'String could not be parsed as XML'
*/

看到我们如何在 SimpleXMLElement 的异常被抛出之前得到 2 个警告了吗?好吧，我们可以像这样将它们转换为异常:-

See how we get 2 Warnings before the the Exception from SimpleXMLElement is thrown? Well, we can convert those to an Exception like this:-

<?php
function getData() {

    set_error_handler(function($errno, $errstr, $errfile, $errline) {
        throw new Exception($errstr, $errno);
    });

    try {
        $xml = new SimpleXMLElement('http://10.0.1.1', null, true);
    }catch(Exception $e) {
        restore_error_handler();
        throw $e;
    }

    return $xml;
}

$xml = getData();

/*
    PHP Fatal error:  Uncaught exception 'Exception' with message 'SimpleXMLElement::__construct(http://10.0.1.1): failed to open stream: Operation timed out'
*/

祝你好运，

安东尼.

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