我无法从外部XML Feed中获取多个xml节点的最低值。 Feed是此XML Feed：http://genusvs.co.uk/xml2015.xml
如您所见，所有xml值节点都被称为不同的东西。饲料中有8832辆汽车。这是一个例子。
<vehicle>
<capid>32076</capid>
<vehicleref>1100128291</vehicleref>
<type>Car</type>
<manufacturer>VAUXHALL</manufacturer>
<model>ZAFIRA ESTATE</model>
<shortmodtext>ZAFIRA</shortmodtext>
<derivative>1.8i Design 5dr</derivative>
<additionalfreetext/>
<paint>Metallic</paint>
<created>22/05/2015 00:20:00</created>
<updated>22/05/2015 00:20:00</updated>
<notes/>
<discount>GENUS TERMS</discount>
<dealercontribution>GENUS TERMS</dealercontribution>
<deliverycharge/>
<registeredstatus/>
<registrationdate/>
<mustbeorderedby/>
<mustbedeliveredby/>
<commission>300</commission>
<source>ARVAL</source>
<vrb/>
<approxleadtime/>
<doors>5</doors>
<transmission>1</transmission>
<fueltype>1</fueltype>
<listprice/>
<Price2Year10kMaintainedCH>568.0600</Price2Year10kMaintainedCH>
<Price2Year10kNotMaintainedCH>548.8600</Price2Year10kNotMaintainedCH>
<Price2Year20kMaintainedCH>605.5000</Price2Year20kMaintainedCH>
<Price2Year20kNotMaintainedCH>569.9900</Price2Year20kNotMaintainedCH>
<Price2Year30kMaintainedCH>647.4800</Price2Year30kMaintainedCH>
<Price2Year30kNotMaintainedCH>591.5900</Price2Year30kNotMaintainedCH>
<Price3Year10kMaintainedCH>452.9400</Price3Year10kMaintainedCH>
<Price3Year10kNotMaintainedCH>427.4500</Price3Year10kNotMaintainedCH>
<Price3Year20kMaintainedCH>489.2800</Price3Year20kMaintainedCH>
<Price3Year20kNotMaintainedCH>447.2000</Price3Year20kNotMaintainedCH>
<Price3Year30kMaintainedCH>528.0100</Price3Year30kMaintainedCH>
<Price3Year30kNotMaintainedCH>465.8100</Price3Year30kNotMaintainedCH>
<Price4Year10kMaintainedCH>391.8600</Price4Year10kMaintainedCH>
<Price4Year10kNotMaintainedCH>361.2900</Price4Year10kNotMaintainedCH>
<Price4Year20kMaintainedCH>424.9000</Price4Year20kMaintainedCH>
<Price4Year20kNotMaintainedCH>378.7100</Price4Year20kNotMaintainedCH>
<Price4Year30kMaintainedCH>488.3100</Price4Year30kMaintainedCH>
<Price4Year30kNotMaintainedCH>403.4700</Price4Year30kNotMaintainedCH>
<Price2Year10kMaintainedPCH>694.7160</Price2Year10kMaintainedPCH>
<Price2Year10kNotMaintainedPCH>671.6760</Price2Year10kNotMaintainedPCH>
<Price2Year20kMaintainedPCH>739.6440</Price2Year20kMaintainedPCH>
<Price2Year20kNotMaintainedPCH>697.0320</Price2Year20kNotMaintainedPCH>
<Price2Year30kMaintainedPCH>790.0200</Price2Year30kMaintainedPCH>
<Price2Year30kNotMaintainedPCH>722.9520</Price2Year30kNotMaintainedPCH>
<Price3Year10kMaintainedPCH>557.0040</Price3Year10kMaintainedPCH>
<Price3Year10kNotMaintainedPCH>526.4160</Price3Year10kNotMaintainedPCH>
<Price3Year20kMaintainedPCH>600.6120</Price3Year20kMaintainedPCH>
<Price3Year20kNotMaintainedPCH>550.1160</Price3Year20kNotMaintainedPCH>
<Price3Year30kMaintainedPCH>647.0880</Price3Year30kMaintainedPCH>
<Price3Year30kNotMaintainedPCH>572.4480</Price3Year30kNotMaintainedPCH>
<Price4Year10kMaintainedPCH>483.9240</Price4Year10kMaintainedPCH>
<Price4Year10kNotMaintainedPCH>447.2400</Price4Year10kNotMaintainedPCH>
<Price4Year20kMaintainedPCH>523.5720</Price4Year20kMaintainedPCH>
<Price4Year20kNotMaintainedPCH>468.1440</Price4Year20kNotMaintainedPCH>
<Price4Year30kMaintainedPCH>599.6640</Price4Year30kMaintainedPCH>
<Price4Year30kNotMaintainedPCH>497.8560</Price4Year30kNotMaintainedPCH>
<ncaprating>0</ncaprating>
<co2>168</co2>
<bhp/>
<mpgcombined>39.2</mpgcombined>
<zerotosixtytwo/>
<topspeed/>
<cc/>
</vehicle>
我需要导入以读取所有价格，并且还创建所有2年，3年，4年 - 10k，20k，30k的维持和非维护的最低价格（不包括0或null），商业或个人，并将其作为自定义值导入..
我已经设法将它们更改为2位小数...为每个创建一个单独的函数，并为WP All Import的functions.php部分中的每个xml属性提供函数代码
例如
<?php
// 10k - maintained - personal
function p2y10kmp($p2y10kmp){ $p2y10kmp = number_format($p2y10kmp, 2, '.', ''); return $p2y10kmp;}
function p3y10kmp($p3y10kmp){ $p3y10kmp = number_format($p3y10kmp, 2, '.', ''); return $p3y10kmp;}
function p4y10kmp($p4y10kmp){ $p4y10kmp = number_format($p4y10kmp, 2, '.', ''); return $p4y10kmp;}
?>
我已经这样做，因为需要网站上不同地方的所有单独值......我正在努力弄清楚如何获得的最小值，将只是作为'来自£+增值税'
还有所有功能值
function p4y10knmp($p4y10knmp){
$p4y10kmp = number_format($p4y10kmp, 2, '.', '');
return $p4y10kmp;
}
导入如
根据WP ALL IMPORT的要求 [([p4y10knmch({Price4Year10kNotMaintainedCH[1]})]
我也尝试从添加的函数值创建一个数组但是我无法使用min（数组）工作？
例子：`
$displayfrom = min(array_diff(array_map('intval', $values), array(0))); return $displayfrom;`
如果有人可以提供帮助，我会乐意提供帮助，如果需要的话。
该网站目前正在www.cocoonoffers.uk上运行，如果你想获得我正在尝试做的事情的一个小工具，目前该网站是从本地版本的xml feed运行，只有21辆车进入饲料。完成后，将使用完整的8832汽车
（自定义字段中的价格值仅是[p4y10knmch({Price4Year10kNotMaintainedCH[1]})]