Possible Duplicate:
Invalid argument supplied for foreach()警告:()提供的foreach参数无效
当我用做在PHP foreach()
如下:
foreach ($this->rawProfileXMLElement->xpath("//dl[@id='overview']/dd[@class='summary-current']/ul[@class='current']/li") as $current)
{
}
它提供了以下错误:
Warning : Invalid Argument Supplied for foreach()
如何恢复它?
您的XPath是没有返回任何节点 – maxjackie 2012-07-09 12:32:29
,只需看你提供的参数的内容开始调试。的var_dump($这 - > rawProfileXMLElement->的xpath( “// DL [@ ID = '概览']/DD [@类= '摘要电流']/UL [@类= '当前'] /锂”)) – 2012-07-09 12:33:14