TCPDF 背景图片透明度

1、TCPDF 背景图片透明度 

参考：https://bbs.csdn.net/topics/392364981

效果：

2、画一条线：

2.1方法解说 

/*画一条线：

       x1：线条起点x坐标

       y1：线条起点y坐标

       x2：线条终点x坐标

       y2：线条终点y坐标

       style：SetLineStyle的效果一样

       */

//       $pdf->Line($x1, $y1, $x2, $y2, $style=array());

 2.2方法使用：

/*线的颜色*/
$this->SetLineStyle(array('width' => 0, 'cap' => 'butt', 'join' => 'miter', 'dash' => '0', 'color' => array(220, 20,60)));
/*画一条线*/
$this->Line(1, 100, 100, 1, $style=array());

/*加入一条下划线   下划线颜色默认为黑色，用此方法【SetLineStyle()】可以自定义线的颜色  */
$this->Cell(180, 0, '', 1, 0, 'C', 0, '', 0, true);

2.3效果：

3.自定义页眉页脚：

/*
 *
 * */
function zidingyi_yemei(){
//============================================================+
// File name   : example_003.php
// Begin       : 2008-03-04
// Last Update : 2013-05-14
//
// Description : Example 003 for TCPDF class
//               Custom Header and Footer
//
// Author: Nicola Asuni
//
// (c) Copyright:
//               Nicola Asuni
//               Tecnick.com LTD
//               www.tecnick.com
//               info@tecnick.com
//============================================================+

    /**
     * Creates an example PDF TEST document using TCPDF
     * @package com.tecnick.tcpdf
     * @abstract TCPDF - Example: Custom Header and Footer
     * @author Nicola Asuni
     * @since 2008-03-04
     */

// Include the main TCPDF library (search for installation path).
    require_once('ThinkPHP/Library/Vendor/tcpdf/tcpdf.php');

// Extend the TCPDF class to create custom Header and Footer
    class MYPDF extends TCPDF {

        //Page header
        /*public function Header() {
            // Logo
            $image_file = K_PATH_IMAGES.'bl_logo.png';
            $this->Image($image_file, 10, 10, 15, '', 'JPG', '', 'T', false, 300, '', false, false, 0, false, false, false);
            // Set font
            $this->SetFont('helvetica', 'B', 20);
            // Title
            $this->Cell(0, 15, '<< TCPDF Example 003 >>', 0, false, 'C', 0, '', 0, false, 'M', 'M');
        }

        // Page footer
        public function Footer() {
            // Position at 15 mm from bottom
            $this->SetY(-15);
            // Set font
            $this->SetFont('helvetica', 'I', 8);
            // Page number
            $this->Cell(0, 10, 'Page '.$this->getAliasNumPage().'/'.$this->getAliasNbPages(), 0, false, 'C', 0, '', 0, false, 'T', 'M');
        }*/
        //Page header 自定义页眉
        public function Header() {
            $this->SetFont('stsongstdlight', '', 10);
            $this->SetHeaderData('', '', ''.' 001', '', array(0,64,255), array(0,64,128));
            // Title
            $this->SetY(1);
            $image_file = K_PATH_IMAGES.'bl_logo.png';
            $this->SetY(1);
            $this->Image($image_file, 15, 3.2, 5, '', 'PNG', '', 'T', false, 300, '', false, false, 0, false, false, false);
            $this->SetY(3.7);
            $left_text = '<p style="text-indent: 20px; color: #00489A; font-weight: bold;">山东保蓝环保工程有限公司</p>';
            //$this->Write(0, $left_text, '', 0, 'L', true, 0, false, false, 0);
            $this->writeHTML($left_text, 1, false, true, false, 'L');
            $this->SetY(3.7);
            $right_text = '<p style="color: #00489A; font-weight: bold;">技术方案</p>';
            $this->writeHTML($right_text, 1, false, true, false, 'R');
            /*$this->Cell(0, 10, '       山东保蓝环保工程有限公司', 0, 0, 'L');
            $this->Cell(0, 10, '技术方案', 0, 0, 'R');*/
            //$this->SetX(1);
            $this->SetY(9);
            /*页眉下划线颜色*/
            $this->SetLineStyle(array('width' => 0, 'cap' => 'butt', 'join' => 'miter', 'dash' => '0', 'color' => array(128,128,128)));
            /*靠左面的距离，左上角的距离 ，长度，右上角的距离*/
            $this->Line(14, 8.6, 196, 8.6, $style=array());

            $this->SetY(19);
            /*页眉下划线*/
            $this->Cell(180, 0, '', 1, 0, 'C', 0, '', 0, true);
        }

        // Page footer 自定义页脚
        public function Footer() {
            // Position at 15 mm from bottom
            $this->SetY(-15);
            // Set font
            $this->SetFont('helvetica', 'I', 8);
            // Page number
            $this->Cell(0, 10, ' '.$this->getAliasNumPage().' / '.$this->getAliasNbPages(), 0, false, 'C', 0, '', 0, false, 'T', 'M');
        }
        /*function Header() //设定页眉
        {
            $this->SetFont('stsongstdlight','',10);
            $this->Write(10,'IPv6协议一致性测试报告','',false,'C');

            $this->Ln(20);
        }

        function Footer() //设定页脚
        {
            $this->SetY(-15);
            $this->SetFont('stsongstdlight','',10);
            $this->Cell(0,10,'第'.$this->PageNo().'页',0,0,'R');
        }*/
    }

// create new PDF document
    $pdf = new MYPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

// set document information
    $pdf->SetCreator(PDF_CREATOR);
    $pdf->SetAuthor('Nicola Asuni');
    $pdf->SetTitle('TCPDF Example 003');
    $pdf->SetSubject('TCPDF Tutorial');
    $pdf->SetKeywords('TCPDF, PDF, example, test, guide');

// set default header data
    $pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE, PDF_HEADER_STRING);

// set header and footer fonts
    $pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
    $pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));

// set default monospaced font
    $pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

// set margins
    $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
    $pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
    $pdf->SetFooterMargin(PDF_MARGIN_FOOTER);

// set auto page breaks
    $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

// set image scale factor
    $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

// set some language-dependent strings (optional)
    if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
        require_once(dirname(__FILE__).'/lang/eng.php');
        $pdf->setLanguageArray($l);
    }

// ---------------------------------------------------------

// set font
    $pdf->SetFont('times', 'BI', 12);

// add a page
    $pdf->AddPage();

// set some text to print
    $txt = <<<EOD
TCPDF Example 003

Custom page header and footer are defined by extending the TCPDF class and overriding the Header() and Footer() methods.
EOD;

// print a block of text using Write()
    $pdf->Write(0, $txt, '', 0, 'C', true, 0, false, false, 0);

// ---------------------------------------------------------

//Close and output PDF document
    $pdf->Output('example_003.pdf', 'I');

//============================================================+
// END OF FILE
//============================================================+

}

 效果：