How to use Selenium with PHP?

You have two choices. You can save the PDF to a file and attach the file or else output it as a string. I find the string output is preferable:

$pdfString = $pdf->Output('dummy.pdf', 'S');

The file name is ignored since it just returns the encoded string. Now you can include the string in your email. I prefer to use PHPMailer when working with attachments like this. Use the AddStringAttachment method of PHPMailer to accomplish this:

$mailer->AddStringAttachment($pdfString, 'some_filename.pdf');

I've solved .... I'm behind a proxy in my organization so I've to set Proxy.

I've found this: HtmlUnitDriver does not appear to be loading page.

Look for FunThomas424242 comment and watch this link https://selenium.googlecode.com/git/docs/api/java/org/openqa/selenium/htmlunit/HtmlUnitDriver.html

So the right code is the follow:

package headlessBrowser;

import org.openqa.selenium.By;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;

public class TestOne {

public static void main(String[] args) {

    // Declaring and initialising the HtmlUnitWebDriver
    HtmlUnitDriver unitDriver = new HtmlUnitDriver();

    // Necessary set Proxy if you're behind it !!!! 
    unitDriver.setProxy("proxy.YOUR-ORGANIZATION.COM", XXXX);

    // open google.com webpage
    unitDriver.get("http://www.google.com");

    System.out.println("Title of the page is -> " + unitDriver.getTitle());

    // find the search edit box on the google page
    WebElement searchBox = unitDriver.findElement(By.name("q"));

    // type in Selenium
    searchBox.sendKeys("Selenium");

    // find the search button
    WebElement button = unitDriver.findElement(By.name("btnG"));

    // Click the button
    button.click();

    System.out.println("Title of the page is -> " + unitDriver.getTitle());

   }
}

The "core" rows are the following

    // Necessary set Proxy if you're behind it !!!! 
    unitDriver.setProxy("proxy.YOUR-ORGANIZATION.COM", XXXX);

where you've to update with your proxy configuration.