createelement('detail');$dom->appendchild($detail01);foreach ($data as $d) {$row = $dom->createelement('row', id=\ {$d['id']} \ name=\ {$d['name']}\ );$detail01->appendchild($row);}return $dom->savexml();}private function usesimplexml(&$data){// 创建一个xml文档并设置xml版本和编码。。$string = xml;$xml = simplexml_load_string($string);foreach ($data as $d) {$xml->addchild('row', id=\ {$d['id']} \ name=\ {$d['name']}\ );}return $xml->asxml(); ;}?>
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调用时每个都加上大数循环操作,并记录时间。
microtime_float();for( $i=0; $i$xml=$this->directwritexml($depdata);$te=$this->microtime_float();$t=$te-$ts;$this->assign('times',$t);$this->assign('method','直接写');break;case 2:$ts=$this->microtime_float();for( $i=0; $i$xml=$this->usedomdocument($depdata);$te=$this->microtime_float();$t=$te-$ts;$this->assign('times',$t);$this->assign('method','domdocument');break;case 3:$ts=$this->microtime_float();for( $i=0; $i$xml=$this->usesimplexml($depdata);$te=$this->microtime_float();$t=$te-$ts;$this->assign('times',$t);$this->assign('method','simplexml');break;}echo $xml;?>
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实测结果：直接写最快，耗时只有其他方式的1/3左右。而其他2种方法差不多，相比之下simplexml要快一些。