SOAP headers are essentially XML namespaces which can be added using DOMDocument's createElementNS. So simply add them before the XML content:
$XMLDoc = new DOMDocument('1.0', 'UTF-8');
$XMLDoc->preserveWhiteSpace = false;
$XMLDoc->formatOutput = true;
// SOAP ENVELOPE ELEMENT AND ATTRIBUTES
$soap = $XMLDoc->createElementNS('http://schemas.xmlsoap.org/soap/envelope/', 'soap:Envelope');
$XMLDoc->appendChild($soap);
$soap->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
$soap->setAttributeNS('http://www.w3.org/2000/xmlns/' ,'xmlns:xsd', 'http://www.w3.org/2001/XMLSchema');
$soap->setAttributeNS('http://www.w3.org/2000/xmlns/' ,'xmlns:soap', 'http://schemas.xmlsoap.org/soap/envelope/');
// SOAP BODY
$body = $XMLDoc->createElementNS('http://schemas.xmlsoap.org/soap/envelope/', 'soap:Body');
// XML CONTENT
$rootElement = $XMLDoc->createElementNS('http://tempuri.org/', 'AddDetails');
$rootNode = $body->appendChild($rootElement);
while($result_array = $result->fetch_assoc()) {
$StockCount++;
foreach($result_array as $key => $value) {
$value=trim($value);
if($value=="NULL" || $value=="" ||$value==-1){
$value="";
}
$value=htmlentities($value);//For validating & chars
$rootNode->appendChild($XMLDoc->createElement($key,$value));
}
}
Alternatively, consider XSLT, the special purpose language to transform XML files. This approach uses your current setup as is and transforms it with XSLT wrapping SOAP headers:
// XML CONTENT
$rootElement = $XMLDoc->createElement('AddDetails');
$rootNode = $XMLDoc->appendChild($rootElement);
while($result_array = $result->fetch_assoc()) {
$StockCount++;
foreach($result_array as $key => $value) {
$value=trim($value);
if($value=="NULL" || $value=="" ||$value==-1){
$value="";
}
$value=htmlentities($value);//For validating & chars
$rootNode->appendChild($XMLDoc->createElement($key,$value));
}
}
// XSL SCRIPT
$XSLDoc = new DOMDocument('1.0', 'UTF-8');
$xslstr = '<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output version="1.0" encoding="UTF-8" indent="yes" />
<xsl:strip-space elements="*" />
<xsl:template match="/">
<xsl:apply-templates select="AddDetails"/>
</xsl:template>
<xsl:template match="AddDetails">
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<AddDetails xmlns="http://tempuri.org/">
<xsl:apply-templates select="@*|node()"/>
</AddDetails>
</soap:Body>
</soap:Envelope>
</xsl:template>
<xsl:template match="*">
<xsl:element name="{local-name()}" namespace="http://tempuri.org/">
<xsl:apply-templates select="@*|node()"/>
</xsl:element>
</xsl:template>
</xsl:transform>';
$XSLDoc->loadXML($xslstr);
// Configure the transformer
$proc = new XSLTProcessor;
$proc->importStyleSheet($XSLDoc);
// Transform XML source
$newXML = $proc->transformToXML($XMLDoc);
echo $newXML;