Php 如何在启动时使用DomNode获取属性值

我希望不使用foreach直接获取特定属性的值，例如

我的代码：

    $xmldoc = new DOMDocument;
    $xmldoc->loadXML($this->Stream);

    $xpa = new DOMXPath($xmldoc);
    $titles = $xpa->query("//tpd:ParameterSet[@ProcessUsage='Customer']/tpd:Parameter/tpd:CustomerInfo");

    foreach ($titles as $title) {

        if ($title->hasAttributes()) {
            foreach ($title->attributes as $attribute) {
                print "AttributName= " . $attribute->name . "\n";
                print "AttributValue= " . $attribute->value . "\n";
            }
        }

"T:\Program\PHP\php.exe" T:\run.php
AttributName= CustomerID
AttributValue= 1223
AttributName= CustomerOrderID
AttributValue= 1552045326210

Process finished with exit code 0

到目前为止，它将为您提供输出：

    $xmldoc = new DOMDocument;
    $xmldoc->loadXML($this->Stream);

    $xpa = new DOMXPath($xmldoc);
    $titles = $xpa->query("//tpd:ParameterSet[@ProcessUsage='Customer']/tpd:Parameter/tpd:CustomerInfo");

    foreach ($titles as $title) {

        if ($title->hasAttributes()) {
            foreach ($title->attributes as $attribute) {
                print "AttributName= " . $attribute->name . "\n";
                print "AttributValue= " . $attribute->value . "\n";
            }
        }

"T:\Program\PHP\php.exe" T:\run.php
AttributName= CustomerID
AttributValue= 1223
AttributName= CustomerOrderID
AttributValue= 1552045326210

Process finished with exit code 0

我的问题： 是否可以直接获取tpd:CustomerInfo/CustomerOrderID的属性值

---

谢谢你的帮助

直接获取属性的XPath是：

//tpd:ParameterSet[@ProcessUsage='Customer']/tpd:Parameter/tpd:CustomerInfo/@CustomerOrderID

好的，我如何在php中输出该值？