ผมใช้ dompdf ในการสร้าง pdf เพื่อส่งเมล์ ส่งเมล์1 เมล์ ได้ แต่เข้า Loop ส่งเมล์ แล้วมันตายที่ $dompdf->render(); อ่ะครับ

// Get the contents of the pdf into a variable for later
				ob_start();
				//require_once("sendmail/pdf.php");
				require_once("../sendmail/pdf_tour.php");
				$pdf_html = ob_get_contents();
				print_r($pdf_html);
				ob_end_clean();
				
				// Get the contents of the pdf into a variable for later
				ob_start();
				//require_once("sendmail/pdf.php");
				require_once("../sendmail/pdf_tour_client.php");
				$pdf_html_client = ob_get_contents();
				print_r($pdf_html_client);
				ob_end_clean();
				
				// Load the dompdf files
				//require_once("sendmail/dompdf/dompdf_config.inc.php");
				require_once("../sendmail/dompdf/dompdf_config.inc.php");
		
				$dompdf = new DOMPDF(); // Create new instance of dompdf
				$dompdf->load_html($pdf_html); // Load the html
				$dompdf->render(); // Parse the html, convert to PDF
				$pdf_content = $dompdf->output(); // Put contents of pdf into variable for later
				
				$dompdf_client = new DOMPDF(); // Create new instance of dompdf
				$dompdf_client->load_html($pdf_html_client); // Load the html
				$dompdf_client->render(); // Parse the html, convert to PDF
				$pdf_content_client = $dompdf_client->output(); // Put contents of pdf into variable for later

// Get the contents of the HTML email into a variable for later
				ob_start();
				//require_once("sendmail/html.php");
				require_once("../sendmail/html_tour.php");
				$html_message = ob_get_contents();
				ob_end_clean();
				
				// Get the contents of the HTML email into a variable for later
				ob_start();
				//require_once("sendmail/html.php");
				require_once("../sendmail/html_tour_client.php");
				$html_message_client = ob_get_contents();
				ob_end_clean();
				
				// Load the SwiftMailer files
				//require_once("sendmail/swift/swift_required.php");
				require_once("../sendmail/swift/swift_required.php");
		
				$mailer = new Swift_Mailer(new Swift_MailTransport()); // Create new instance of SwiftMailer
				$mailer_client = new Swift_Mailer(new Swift_MailTransport()); // Create new instance of SwiftMailer