Php xampp使用gmail帐户发送邮件，来自ubuntu

我已经为ubuntu安装了Xampp。它位于/opt/lampp中。我想配置php.ini和sendmail.ini文件，以便能够使用gmail smtp服务器发送邮件。php.ini位于/opt/lampp/etc中，但我找不到sendmail.ini文件。stackoverflow上的大多数资源也用于Windows。有人能指出ubuntu和xampp服务器的配置吗。

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非常感谢。

使用zend_mail，而不是使用gmail配置发送邮件

$settings = array('ssl'=>'ssl',
                                'port'=>465,
                                'auth' => 'login',
                                'username' => 'youremail@gmail.com',
                                'password' => 'YOUR_PASSWORD');
                $transport = new Zend_Mail_Transport_Smtp('smtp.gmail.com', $settings);
                $email_from = "YOUR_EMAIL";
                $name_from = "YOUR NAME";
                $email_to = "TO_EMAIL";
                $name_to = "TO NAME";

                $mail = new Zend_Mail ();
                $mail->setReplyTo($email_from, $name_from);
                $mail->setFrom ($email_from, $name_from);
                $mail->addTo ($email_to, $name_to);
                $mail->setSubject ('Testing email using google accounts and Zend_Mail');
                $mail->setBodyText ("Email body");
                $mail->send($transport);

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使用zend_mail，而不是使用gmail配置发送邮件

$settings = array('ssl'=>'ssl',
                                'port'=>465,
                                'auth' => 'login',
                                'username' => 'youremail@gmail.com',
                                'password' => 'YOUR_PASSWORD');
                $transport = new Zend_Mail_Transport_Smtp('smtp.gmail.com', $settings);
                $email_from = "YOUR_EMAIL";
                $name_from = "YOUR NAME";
                $email_to = "TO_EMAIL";
                $name_to = "TO NAME";

                $mail = new Zend_Mail ();
                $mail->setReplyTo($email_from, $name_from);
                $mail->setFrom ($email_from, $name_from);
                $mail->addTo ($email_to, $name_to);
                $mail->setSubject ('Testing email using google accounts and Zend_Mail');
                $mail->setBodyText ("Email body");
                $mail->send($transport);