有关 SimpleXMLElement 的除错 for SegmentFault

我用了一个方式去抓一列something…之后我要解析成xml的格式
当然是可行的，但时不及会出错 于是我写下了

<code>try{    $sports = new SimpleXMLElement($parsedJson);}catch (Exception $e){  Print_r($e)}</code>

结果为

<code>Warning: SimpleXMLElement::__construct(): Entity: line 1: parser error : Space required after the Public Identifier in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on<i>*本5文来源gaodai$ma#com搞$$代**码)网@</i><img>搞代码gaodaima</img> line 121 Warning: SimpleXMLElement::__construct(): Entity: line 6: parser error : Opening and ending tag mismatch: hr line 5 and BODY in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 6: parser error : Opening and ending tag mismatch: BODY line 4 and HTML in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 7: parser error : Premature end of data in tag HEAD line 2 in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 7: parser error : Premature end of data in tag HTML line 2 in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121</code>

我想到我之前用 curl 抓东西时，用过 json_decode
当时我用这样的方式来让程序自动重抓

<code>do{      $data = @json_decode(file_get_contents($url), true);}while($data == false);</code>

我想请教的是
如果我的 new SimpleXMLElement 失败了，我也可以用类似的方式作吗？

<code>Do{    抓资料;    $data=@json_decode(something);    $xml = new SimpleXMLElement($data);}while($xml == false);</code>

如果 new SimpleXMLElemen 发生以上的错误，$xml 会 等于 false吗？
求解

回复内容：

我用了一个方式去抓一列something…之后我要解析成xml的格式
当然是可行的，但时不及会出错 于是我写下了

<code>try{    $sports = new SimpleXMLElement($parsedJson);}catch (Exception $e){  Print_r($e)}</code>

结果为

<code>Warning: SimpleXMLElement::__construct(): Entity: line 1: parser error : Space required after the Public Identifier in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 6: parser error : Opening and ending tag mismatch: hr line 5 and BODY in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 6: parser error : Opening and ending tag mismatch: BODY line 4 and HTML in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 7: parser error : Premature end of data in tag HEAD line 2 in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): Entity: line 7: parser error : Premature end of data in tag HTML line 2 in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): in /home/ns/www/admin/gamble/baseball.php on line 121 Warning: SimpleXMLElement::__construct(): ^ in /home/ns/www/admin/gamble/baseball.php on line 121</code>

我想到我之前用 curl 抓东西时，用过 json_decode
当时我用这样的方式来让程序自动重抓

<code>do{      $data = @json_decode(file_get_contents($url), true);}while($data == false);</code>

我想请教的是
如果我的 new SimpleXMLElement 失败了，我也可以用类似的方式作吗？

<code>Do{    抓资料;    $data=@json_decode(something);    $xml = new SimpleXMLElement($data);}while($xml == false);</code>

如果 new SimpleXMLElemen 发生以上的错误，$xml 会 等于 false吗？
求解

首先，问题可能是因为xml捕获了一个非正常XML格式的数据，如果要捕获错误，可以这样

<code>/**  * 解析XML格式的字符串  *  * @param string $str  * @return 解析正确就返回解析结果,否则返回false,说明字符串不是XML格式  */ function xml_parser($str){     $xml_parser = xml_parser_create();     if(!xml_parse($xml_parser,$str,true)){         xml_parser_free($xml_parser);         return false;     } else {         return (json_decode(json_encode(simplexml_load_string($str)),true));     } } </code>

另外，你通过file_get_contents($url)，直接抓取URL，是有可能抓不全数据的哦，这里我推荐一个HTTP请求的类：

简单而强大的HTTP请求类，来自类库：lv

http://levi.cg.am/archives/3534

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