TCPDF 在单个 <hr> 标签上报告“未定义索引：样式”

问题描述

简单的

$pdf->writeHTML("<hr>",true,false,'');

上次测试时确实有效（TCPDF 的几个版本之前），现在导致“未定义索引：样式”。

来自TCPDF源的相关代码是

case 'hr': {
    if ((isset($tag['height'])) AND ($tag['height'] != '')) {
        $hrHeight = $this->getHTMLUnitToUnits($tag['height'],1,'px');
    } else {
        $hrHeight = $this->GetLineWidth();
    }
    $this->addHTMLVertSpace($hbz,max($hb,($hrHeight / 2)),$cell,$firsttag);
    $x = $this->GetX();
    $y = $this->GetY();
    $wtmp = $this->w - $this->lMargin - $this->rMargin;
    if ($cell) {
        $wtmp -= ($this->cell_padding['L'] + $this->cell_padding['R']);
    }
    if ((isset($tag['width'])) AND ($tag['width'] != '')) {
        $hrWidth = $this->getHTMLUnitToUnits($tag['width'],$wtmp,'px');
    } else {
        $hrWidth = $wtmp;
    }
    $prevlinewidth = $this->GetLineWidth();

    $this->SetLineWidth($hrHeight);
        $lineStyle = array(
        'color' => $tag['fgcolor'],'cap'   => $tag['style']['cap'],// Error thrown here.
        'join'  => $tag['style']['join'],'dash'  => $tag['style']['dash'],'phase' => $tag['style']['phase'],);

    $lineStyle = array_filter($lineStyle);

    $this->Line($x,$y,$x + $hrWidth,$lineStyle);
    $this->SetLineWidth($prevlinewidth);
    $this->addHTMLVertSpace(max($hbc,!isset($dom[($key + 1)]));
    break;

$tag 的值为

Array
(
    [elkey] => 0
    [tag] => 1
    [value] => hr
    [block] => 1
    [opening] => 1
    [parent] => 0
    [self] => 1
    [hide] => 
    [fontname] => dejavusans
    [fontstyle] => 
    [fontsize] => 10
    [font-stretch] => 100
    [letter-spacing] => 0
    [stroke] => 0
    [fill] => 1
    [clip] => 
    [line-height] => 1.25
    [bgcolor] => 
    [fgcolor] => Array
        (
            [R] => 0
            [G] => 0
            [B] => 0
        )

    [strokecolor] => Array
        (
            [R] => 0
            [G] => 0
            [B] => 0
        )

    [align] => 
    [listtype] => 
    [text-indent] => 0
    [text-transform] => 
    [border] => Array
        (
        )

    [dir] => ltr
    [attribute] => Array
        (
        )

)

可以看出，没有 style 键。我做错了什么，还是这是 TCPDF 中的错误？我该如何解决？

解决方法

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