private function insertWatermarkText($doc, $watermarkText)
{
// Create a watermark shape. This will be a WordArt shape.
// You are free to try other shape types as watermarks.
$shapeType = new Java("com.aspose.words.ShapeType");
$watermark = new Java("com.aspose.words.Shape", $doc, $shapeType->TEXT_PLAIN_TEXT);
// Set up the text of the $watermark->
$watermark->getTextPath()->setText($watermarkText);
$watermark->getTextPath()->setFontFamily("Arial");
$watermark->setWidth(500);
$watermark->setHeight(100);
// Text will be directed from the bottom-left to the top-right corner.
$watermark->setRotation(-40);
// Remove the following two lines if you need a solid black text.
$color = new Java("java.awt.Color");
$watermark->getFill()->setColor($color->GRAY);
// Try LightGray to get more Word-style watermark
$watermark->setStrokeColor($color->GRAY);
// Try LightGray to get more Word-style watermark
// Place the watermark in the page center.
$relativeHorizontalPosition = new Java("com.aspose.words.RelativeHorizontalPosition");
$watermark->setRelativeHorizontalPosition($relativeHorizontalPosition->PAGE);
$watermark->setRelativeVerticalPosition($relativeHorizontalPosition->PAGE);
$wrapType = new Java("com.aspose.words.WrapType");
$watermark->setWrapType($wrapType->NONE);
$verticalAlignment = new Java("com.aspose.words.VerticalAlignment");
$watermark->setVerticalAlignment($verticalAlignment->CENTER);
$horizontalAlignment = new Java("com.aspose.words.HorizontalAlignment");
$watermark->setHorizontalAlignment($horizontalAlignment->CENTER);
// Create a new paragraph and append the watermark to this paragraph.
$watermarkPara = new Java("com.aspose.words.Paragraph", $doc);
$watermarkPara->appendChild($watermark);
$sects = $doc->getSections()->toArray();
// Insert the watermark into all headers of each document section.
foreach ($sects as $sect) {
$headerFooterType = new Java("com.aspose.words.HeaderFooterType");
// There could be up to three different headers in each section, since we want
// the watermark to appear on all pages, insert into all headers.
$this->insertWatermarkIntoHeader($watermarkPara, $sect, $headerFooterType->HEADER_PRIMARY);
$this->insertWatermarkIntoHeader($watermarkPara, $sect, $headerFooterType->HEADER_FIRST);
$this->insertWatermarkIntoHeader($watermarkPara, $sect, $headerFooterType->HEADER_EVEN);
}
}