mpdf
使用composer安装mpdf，选择适合自己的版本：
https://packagist.org/packages/mpdf/mpdf
手册：
本文使用的mpdf版本：7.0
基本使用：
$mpdf = new Mpdf();$mpdf->WriteHTML('内容');//自动分析录入内容字体 不设置会导致乱码$mpdf->autoScriptToLang = true;$mpdf->autoLangToFont = true;//输出到页面$mpdf->Output();//生成文件$mpdf->Output('生成文件的路径');
页眉页脚：
//html页眉页脚 可以控制更详细的样式$mpdf->SetHTMLHeader('页眉');$mpdf->SetHTMLFooter('页脚');//页眉$mpdf->SetHeader('页眉');$mpdf->SetFooter('页脚');$mpdf->defaultheaderline = 0;//页眉线宽度$mpdf->defaultfooterline = 0;//页脚线宽度
页码：
//{PAGENO}当前页码 {nb}总页数$mpdf->SetHTMLFooter('{PAGENO}/{nb}');水印：
->SetWatermarkText('文字水印',0.2);->watermark_font = 'GB';->watermarkAngle = '45';->showWatermarkText = ;->SetWatermarkImage('图片路径',0.4,[100,100],[0,0]);->showWatermarkImage = ;
遇到的问题：
1.水印无法平铺，解决办法：
文字水印：
找到 Mpdf.php 中的 watermark 方法，
把 $this->Text($wx, $wy, $texte, $OTLdata, $textvar); 修改为：
//平铺文字水印 $this->Text(-50, 200, $texte, $OTLdata, $textvar); $this->Text(0, 150, $texte, $OTLdata, $textvar); $this->Text(0, 250, $texte, $OTLdata, $textvar); $this->Text(50, 100, $texte, $OTLdata, $textvar); $this->Text(50, 200, $texte, $OTLdata, $textvar); $this->Text(50, 300, $texte, $OTLdata, $textvar); $this->Text(100, 50, $texte, $OTLdata, $textvar); $this->Text(100, 150, $texte, $OTLdata, $textvar); $this->Text(100, 250, $texte, $OTLdata, $textvar); $this->Text(150, 0, $texte, $OTLdata, $textvar); $this->Text(150, 100, $texte, $OTLdata, $textvar); $this->Text(150, 200, $texte, $OTLdata, $textvar); $this->Text(200, 50, $texte, $OTLdata, $textvar); $this->Text(200, 150, $texte, $OTLdata, $textvar); $this->Text(250, 100, $texte, $OTLdata, $textvar);
图片水印：
找到 Mpdf.php 中的 Image 方法，修改的代码标黄了，大概就是位置支持了二维数组，有需要可以自己改，这里仅供参考：
function Image($file, $x, $y, $w = 0, $h = 0, $type = '', $link = '', $paint = true, $constrain = true, $watermark = false, $shownoimg = true, $allowvector = true)
{ $orig_srcpath = $file; $this->GetFullPath($file); $info = $this->imageProcessor->getImage($file, true, $allowvector, $orig_srcpath); if (!$info && $paint) { $info = $this->imageProcessor->getImage($this->noImageFile); if ($info) { $file = $this->noImageFile; $w = ($info['w'] * (25.4 / $this->dpi)); // 14 x 16px
$h = ($info['h'] * (25.4 / $this->dpi)); // 14 x 16px }
} if (!$info) { return false;
} // Automatic width and height calculation if needed
if ($w == 0 and $h == 0) { /* -- IMAGES-WMF -- */
if ($info['type'] == 'wmf') { // WMF units are twips (1/20pt)
// divide by 20 to get points
// divide by k to get user units
$w = abs($info['w']) / (20 * Mpdf::SCALE); $h = abs($info['h']) / (20 * Mpdf::SCALE);
} else { /* -- END IMAGES-WMF -- */
if ($info['type'] == 'svg') { // returned SVG units are pts
// divide by k to get user units (mm)
$w = abs($info['w']) / Mpdf::SCALE; $h = abs($info['h']) / Mpdf::SCALE;
} else { // Put image at default image dpi
$w = ($info['w'] / Mpdf::SCALE) * (72 / $this->img_dpi); $h = ($info['h'] / Mpdf::SCALE) * (72 / $this->img_dpi);
}
}
} if ($w == 0) { $w = abs($h * $info['w'] / $info['h']);
} if ($h == 0) { $h = abs($w * $info['h'] / $info['w']);
} /* -- WATERMARK -- */
if ($watermark) { $maxw = $this->w; $maxh = $this->h; // Size = D PF or array
if (is_array($this->watermark_size)) { $w = $this->watermark_size[0]; $h = $this->watermark_size[1];
} elseif (!is_string($this->watermark_size)) { $maxw -= $this->watermark_size * 2; $maxh -= $this->watermark_size * 2; $w = $maxw; $h = abs($w * $info['h'] / $info['w']); if ($h > $maxh) { $h = $maxh; $w = abs($h * $info['w'] / $info['h']);
}
} elseif ($this->watermark_size == 'F') { if ($this->ColActive) { $maxw = $this->w - ($this->DeflMargin + $this->DefrMargin);
} else { $maxw = $this->pgwidth;
} $maxh = $this->h - ($this->tMargin + $this->bMargin); $w = $maxw; $h = abs($w * $info['h'] / $info['w']); if ($h > $maxh) { $h = $maxh; $w = abs($h * $info['w'] / $info['h']);
}
} elseif ($this->watermark_size == 'P') { // Default P
$w = $maxw; $h = abs($w * $info['h'] / $info['w']); if ($h > $maxh) { $h = $maxh; $w = abs($h * $info['w'] / $info['h']);
}
} // Automatically resize to maximum dimensions of page if too large
if ($w > $maxw) { $w = $maxw; $h = abs($w * $info['h'] / $info['w']);
} if ($h > $maxh) { $h = $maxh; $w = abs($h * $info['w'] / $info['h']);
} // Position
$pos_list = []; $outstring_list = []; if (isset($this->watermark_pos[0]) && is_array($this->watermark_pos[0])) { foreach ($this->watermark_pos as $k => $v) { $pos_list[] = ['x'=>$v[0],'y'=>$v[1]];
} $x = $this->watermark_pos[0]; $y = $this->watermark_pos[1]; } elseif (is_array($this->watermark_pos)) { $x = $this->watermark_pos[0]; $y = $this->watermark_pos[1];
} elseif ($this->watermark_pos == 'F') { // centred on printable area
if ($this->ColActive) { // *COLUMNS*
if (($this->mirrorMargins) && (($this->page) % 2 == 0)) { $xadj = $this->DeflMargin - $this->DefrMargin;
} // *COLUMNS*
else { $xadj = 0;
} // *COLUMNS*
$x = ($this->DeflMargin - $xadj + ($this->w - ($this->DeflMargin + $this->DefrMargin)) / 2) - ($w / 2); // *COLUMNS*
} // *COLUMNS*
else { // *COLUMNS*
$x = ($this->lMargin + ($this->pgwidth) / 2) - ($w / 2);
} // *COLUMNS*
$y = ($this->tMargin + ($this->h - ($this->tMargin + $this->bMargin)) / 2) - ($h / 2);
} else { // default P - centred on whole page
$x = ($this->w / 2) - ($w / 2); $y = ($this->h / 2) - ($h / 2);
} /* -- IMAGES-WMF -- */
if ($pos_list) { if ($info['type'] == 'wmf') { $sx = $w * Mpdf::SCALE / $info['w']; $sy = -$h * Mpdf::SCALE / $info['h']; foreach ($pos_list as $k => $v) { $outstring_list[] = sprintf('q %.3F 0 0 %.3F %.3F %.3F cm /FO%d Do Q', $sx, $sy, $v['x'] * Mpdf::SCALE - $sx * $info['x'], (($this->h - $v['y']) * Mpdf::SCALE) - $sy * $info['y'], $info['i']);
}
} else { /* -- END IMAGES-WMF -- */
if ($info['type'] == 'svg') { $sx = $w * Mpdf::SCALE / $info['w']; $sy = -$h * Mpdf::SCALE / $info['h']; foreach ($pos_list as $k => $v) { $outstring_list[] = sprintf('q %.3F 0 0 %.3F %.3F %.3F cm /FO%d Do Q', $sx, $sy, $v['x'] * Mpdf::SCALE - $sx * $info['x'], (($this->h - $v['y']) * Mpdf::SCALE) - $sy * $info['y'], $info['i']);
}
} else { foreach ($pos_list as $k => $v) { $outstring_list[] = sprintf("q %.3F 0 0 %.3F %.3F %.3F cm /I%d Do Q", $w * Mpdf::SCALE, $h * Mpdf::SCALE, $v['x'] * Mpdf::SCALE, ($this->h - ($v['y'] + $h)) * Mpdf::SCALE, $info['i']);
}
}
}
} else { if ($info['type'] == 'wmf') { $sx = $w * Mpdf::SCALE / $info['w']; $sy = -$h * Mpdf::SCALE / $info['h']; $outstring = sprintf('q %.3F 0 0 %.3F %.3F %.3F cm /FO%d Do Q', $sx, $sy, $x * Mpdf::SCALE - $sx * $info['x'], (($this->h - $y) * Mpdf::SCALE) - $sy * $info['y'], $info['i']);
} else { /* -- END IMAGES-WMF -- */
if ($info['type'] == 'svg') { $sx = $w * Mpdf::SCALE / $info['w']; $sy = -$h * Mpdf::SCALE / $info['h']; $outstring = sprintf('q %.3F 0 0 %.3F %.3F %.3F cm /FO%d Do Q', $sx, $sy, $x * Mpdf::SCALE - $sx * $info['x'], (($this->h - $y) * Mpdf::SCALE) - $sy * $info['y'], $info['i']);
} else { $outstring = sprintf("q %.3F 0 0 %.3F %.3F %.3F cm /I%d Do Q", $w * Mpdf::SCALE, $h * Mpdf::SCALE, $x * Mpdf::SCALE, ($this->h - ($y + $h)) * Mpdf::SCALE, $info['i']);
}
}
} if ($this->watermarkImgBehind) { $outstring = $this->watermarkImgAlpha . "\n" . $outstring . "\n" . $this->SetAlpha(1, 'Normal', true) . "\n"; $this->pages[$this->page] = preg_replace('/(___BACKGROUND___PATTERNS' . $this->uniqstr . ')/', "\n" . $outstring . "\n" . '\\1', $this->pages[$this->page]);
} else { if ($outstring_list) { foreach ($outstring_list as $k => $v) { $this->_out($v);
}
} else { $this->_out($outstring);
}
} return 0;
} // end of IF watermark
/* -- END WATERMARK -- */
if ($constrain) { // Automatically resize to maximum dimensions of page if too large
if (isset($this->blk[$this->blklvl]['inner_width']) && $this->blk[$this->blklvl]['inner_width']) { $maxw = $this->blk[$this->blklvl]['inner_width'];
} else { $maxw = $this->pgwidth;
} if ($w > $maxw) { $w = $maxw; $h = abs($w * $info['h'] / $info['w']);
} if ($h > $this->h - ($this->tMargin + $this->bMargin + 1)) { // see below - +10 to avoid drawing too close to border of page
$h = $this->h - ($this->tMargin + $this->bMargin + 1); if ($this->fullImageHeight) { $h = $this->fullImageHeight;
} $w = abs($h * $info['w'] / $info['h']);
} // Avoid drawing out of the paper(exceeding width limits).
// if ( ($x + $w) > $this->fw ) {
if (($x + $w) > $this->w) { $x = $this->lMargin; $y += 5;
} $changedpage = false; $oldcolumn = $this->CurrCol; // Avoid drawing out of the page.
if ($y + $h > $this->PageBreakTrigger and ! $this->InFooter and $this->AcceptPageBreak()) { $this->AddPage($this->CurOrientation); // Added to correct for OddEven Margins
$x = $x + $this->MarginCorrection; $y = $this->tMargin; // mPDF 5.7.3
$changedpage = true;
} /* -- COLUMNS -- */
// COLS
// COLUMN CHANGE
if ($this->CurrCol != $oldcolumn) { $y = $this->y0; $x += $this->ChangeColumn * ($this->ColWidth + $this->ColGap); $this->x += $this->ChangeColumn * ($this->ColWidth + $this->ColGap);
} /* -- END COLUMNS -- */
} // end of IF constrain
/* -- IMAGES-WMF -- */
if ($info['type'] == 'wmf') { $sx = $w * Mpdf::SCALE / $info['w']; $sy = -$h * Mpdf::SCALE / $info['h']; $outstring = sprintf('q %.3F 0 0 %.3F %.3F %.3F cm /FO%d Do Q', $sx, $sy, $x * Mpdf::SCALE - $sx * $info['x'], (($this->h - $y) * Mpdf::SCALE) - $sy * $info['y'], $info['i']);
} else { /* -- END IMAGES-WMF -- */
if ($info['type'] == 'svg') { $sx = $w * Mpdf::SCALE / $info['w']; $sy = -$h * Mpdf::SCALE / $info['h']; $outstring = sprintf('q %.3F 0 0 %.3F %.3F %.3F cm /FO%d Do Q', $sx, $sy, $x * Mpdf::SCALE - $sx * $info['x'], (($this->h - $y) * Mpdf::SCALE) - $sy * $info['y'], $info['i']);
} else { $outstring = sprintf("q %.3F 0 0 %.3F %.3F %.3F cm /I%d Do Q", $w * Mpdf::SCALE, $h * Mpdf::SCALE, $x * Mpdf::SCALE, ($this->h - ($y + $h)) * Mpdf::SCALE, $info['i']);
}
} if ($paint) { $this->_out($outstring); if ($link) { $this->Link($x, $y, $w, $h, $link);
} // Avoid writing text on top of the image. // THIS WAS OUTSIDE THE if ($paint) bit!!!!!!!!!!!!!!!!
$this->y = $y + $h;
} // Return width-height array
$sizesarray['WIDTH'] = $w; $sizesarray['HEIGHT'] = $h; $sizesarray['X'] = $x; // Position before painting image
$sizesarray['Y'] = $y; // Position before painting image
$sizesarray['OUTPUT'] = $outstring; $sizesarray['IMAGE_ID'] = $info['i']; $sizesarray['itype'] = $info['type']; $sizesarray['set-dpi'] = (isset($info['set-dpi']) ? $info['set-dpi'] : 0); return $sizesarray;
}
2.生成的pdf是“非标准格式”，解决办法：
$mpdf->useAdobeCJK = true;$mpdf->autoScriptToLang = true;$mpdf->autoLangToFont = true;
3.不支持元素display属性变化，不支持position定位
4.一个只包含中文符号的html标签（并非中文文字乱码），中文符号会变成乱码，我这里换成了7.1以上的版本，并且 new Mpdf(['mode' => 'zh-cn']) 设置了'mode' => 'zh-cn'，解决了这个问题