Add background to PDF

Background images can be used to add a watermark, or other subtle design, to documents. In Aspose.PDF for PHP via Java, each PDF document is a collection of pages and each page contains a collection of artifacts. The BackgroundArtifact class can be used to add a background image to a page object.

The following code snippet shows how to add a background image to PDF pages using the BackgroundArtifact object using PHP.

    // Open document
    $document = new Document($inputFile);

    // Add a new page to document object
    $page = $document->getPages()->add();

    // Create BackgroundArtifact object    
    $background = new BackgroundArtifact();

    // Specify the image for backgroundArtifact object
    $fileInputStream = new java("java.io.FileInputStream", "image.jpg");
    $background->setBackgroundImage($fileInputStream);

    // Add backgroundArtifact to artifacts collection of page
    $page->getArtifacts()->add($background);

    // Save updated PDF file
    $document->save($outputFile);
    $document->close();