php - simplexml 错误处理 php

Question

我正在使用以下代码:

function GetTwitterAvatar($username){
$xml = simplexml_load_file("http://twitter.com/users/".$username.".xml");
$imgurl = $xml->profile_image_url;
return $imgurl;
}

function GetTwitterAPILimit($username, $password){
$xml = simplexml_load_file("http://$username:$password@twitter.com/account/rate_limit_status.xml");
$left = $xml->{"remaining-hits"};
$total = $xml->{"hourly-limit"};
return $left."/".$total;
}

并在流无法连接时出现这些错误:

Warning: simplexml_load_file(http://twitter.com/users/****.xml) [function.simplexml-load-file]: failed to open stream: HTTP request failed! HTTP/1.0 503 Service Unavailable

Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity "http://twitter.com/users/****.xml" 

Warning: simplexml_load_file(http://...@twitter.com/account/rate_limit_status.xml) [function.simplexml-load-file]: failed to open stream: HTTP request failed! HTTP/1.0 503 Service Unavailable

Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity "http://***:***@twitter.com/account/rate_limit_status.xml"

如何处理这些错误，以便显示用户友好的消息而不是上面显示的消息？

Answer 1

我觉得这样比较好

$use_errors = libxml_use_internal_errors(true);
$xml = simplexml_load_file($url);
if (false === $xml) {
  // throw new Exception("Cannot load xml source.\n");
}
libxml_clear_errors();
libxml_use_internal_errors($use_errors);

更多信息:http://php.net/manual/en/function.libxml-use-internal-errors.php