无法从Simplexml发送lat/lng到mysql数据库

Question

值startlat，startlon，endlat，endlon在我的查询字符串中显示为来自simplexml对象的字段名称。

我打印出来的查询字符串，看看第3，第4，第5和第6个值

insert into *database.table* (mwayname, sectionname, startlat, startlon, endlat,endlon,avgspd,avgocc,totvol,seclength,sectime)VALUES ('AKL-SH1-NB-RNM' , '1-NB PAPAKURA OFF to PAPAKURA ON' , '->latitude', '->longitude' , '->latitude' , '->longitude' ,'98.7012505914656' , '3.0' , '12.0' , '0.309545' , '0.18817086803564703') 

它发送simplexml->到查询的文本中，还有其他价值，也数值不受影响??当然不是因为查询构造函数在循环中？

$xml = new SimpleXMLElement($response); 

foreach($xml->return as $return) 
{ 
echo '**********************',$return->name.'*****<br>'; 
echo '**********************',$return->reference.'*****<br>'; 

foreach($return->segments as $segments) 
{ 
echo $return->name.'<br>'; 
echo $return->reference.'<br>'; 

echo $segments->carriagewaySegmentId.' ID <br>'; 
echo 'section name ',$segments->sectionName.'<br>'; 

echo 'start lat ',$segments->startLocation->latitude.'<br>'; 
echo 'start lng ',$segments->startLocation->longitude.' <br>'; 

echo 'end lat ',$segments->endLocation->latitude.'<br>'; 
echo 'end long ',$segments->endLocation->longitude.'<br>'; 

echo 'avg speed = ',$segments->averageSpeed. ' kmh avg<br>'; 
echo $segments->averageOccupancy. ' % of rd occupied<br>'; 
echo $segments->totalVolume. ' traffic volume<br>'; 
echo $segments->sectionLength. ' km<br>'; 
echo $segments->sectionTime. ' minutes<br>'; 
echo'<br>'; 
//send to mysql 
$query = "insert into trafficstats.master (mwayname, sectionname, startlat, startlon,  endlat,endlon,avgspd,avgocc,totvol,seclength,sectime)VALUES ('$return->reference' , '$segments->sectionName' , '$segments->startLocation->latitude', '$segments->startLocation->longitude' , '$segments->endLocation->latitude' , '$segments->endLocation->longitude' ,'$segments- >averageSpeed' , '$segments- 

>averageOccupancy' , '$segments->totalVolume' , '$segments->sectionLength' , '$segments->sectionTime')"; 
echo $query; 
mysql_query($query); 
} 
} 
?> 

Answer 1

尝试此查询

$query = "insert into trafficstats.master (mwayname, sectionname, startlat, startlon,  endlat,endlon,avgspd,avgocc,totvol,seclength,sectime) 
VALUES ('".$return->reference."' , '".$segments->sectionName."' , 
'".$segments->startLocation->latitude."', '".$segments->startLocation->longitude."' , 
'".$segments->endLocation->latitude."' , '".$segments->endLocation->longitude."' , 
'".$segments- >averageSpeed."' , '".$segments->averageOccupancy."' , 
'".$segments->totalVolume."' , '".$segments->sectionLength."' , 
'".$segments->sectionTime."')"; 

Answer 2

在这里解释的问题，PHP遇到一个双引号字符串一样"something $foo->bar->baz something"时，它假设你只是想更换$foo->bar，而不是整个的$foo->bar->baz。

该溶液是（如其他人指出），以由多个部分（'something ' . $foo->bar->baz . ' something'）一起将字符串或以围绕变量在括号取代，使得PHP知道它是所有一个变量（"something {$foo->bar->baz} something"）。

有关此语法的更多信息，请参见the relevant section of the PHP manual。