我想创建一个 PHP 脚本，将 XML 格式化为电视/电影剧本，事实证明这比预期的要困难一些。我已经创建了一些代码，但是，有些地方我会卡住。

一点背景

在剧本中存在多个标签，如角色、对话、场景标题、过渡等。它们具有不同的宽度和左右边距，决定了页面上的位置。

有两个主要方面引起了关注，即我无法弄清楚:

• Parent/Children XML 标签，不能分开。
• 如果子标签很长并且必须继续到另一个页面，则必须创建后续标签以表明它仍然是父标签。例如，如果显示了一个 Character 标签，并且该标签的对话(通过宽度、字符长度和行高)计算(通过宽度、字符长度和行高)继续到下一页，那么必须再次显示父“字符”下一页的顶部。
  • 此类父/孤儿标签包括:
  • "sceneheadng"-> 任何标签。
  • “字符”-> 对话框或括号
  • “括号”-> 对话框

然而，理想情况下，父/子标签应该存储在这样的地方，这样就可以在没有大量代码的情况下添加更多标签。

经过大量 FPDF 配置和尝试后，这是我目前所拥有的:

// Parse the XML string which has been requested from the database.
$xml                        = new SimpleXmlIterator($file, null);
$namespaces                 = $xml->getNamespaces(true);
/*
 * An external function which converts the XML into an ORDERED array.
 * This returns all the attributes of the xml and the following:
 *  "@type"     Refers to the type, i.e. character/dialog etc,
 *  "@content"  What was actually within the tags of the XML.
 */
$source                     = $parseXML($xml, $namespaces);
$saved                      = array ();
// For every line of the XML.
foreach ($source as $index => $line) {
    /*
     * We are going to save the current line of the XML so that we
     * can check the size of the saved cells against the size of the 
     * page. If there is not enough space for specific tags which are
     * required such as character and dialog, then we create a new page.
     * 
     */
    $saved[]                = $line;
    $forward                = false;
    /*
     * Here is where I get somewhat confused - I have attempted to create
     * a mechanism that determines the "@types" which are needed as parents
     * and children of one another. 
     *
     * The $forward variable refers to the possibilty of writing the tag to
     * the PDF. If the parent/orphan is possible or there are non, then it
     * should be able to write.
     */
    if ($forward) {
        $width              = 0;
        foreach ($saved as $index => $value) {
            /*
             * Everything is measured in inches, therefore, I have created a 
             * point() function which turns inches into mm so that FPDF understands
             * everything.
             * 
             * The $format variable is an array which has margins, either top,
             * left or right. We use this to position the Cell of a specific @type
             * so that it appears in the correct format for a TV/Film script.
             *
             * The width variable is deduced via finding the full width of the page,
             * then subtracting the subsequent left and right margin of the said
             * @type.
             */     
            $width          = (point ($setting["width"])
                            - (point ($format[$value["@type"]]["margin-left"])
                            +  point ($format[$value["@type"]]["margin-right"])));
            /*
             * The $pdf variable is that of the FPDF Class.
             */
            $pdf->SetLeftMargin (point($format[$value["@type"]]["margin-left"]));
            $pdf->SetRightMargin (point($format[$value["@type"]]["margin-right"]));
            // Formatting purposes.
            $pdf->Ln (0);   
            $pdf->MultiCell (
                $width,
                point ($setting["line-height"]), //Line height? Still needs fixing.
                $value["@content"], // Physical text
                1); // A temporary border to see what's going on.
        }
        // Reset the $saved, after no more parent/children?
        $saved              = array ();
    }
}

另外，我写了一个函数来计算组合的“$saved”行的高度:

function calculate_page_breaks ($saved_lines, $act_upon = true) {
    $num_lines          = 0;
    foreach ($saved_lines as $value) {
        $column_width   = (point ($setting["width"])
                        - (point ($format[$type][$value["@type"]]["margin-left"])
                        +  point ($format[$type][$value["@type"]]["margin-right"])));
        $num_lines      += ceil($pdf->GetStringWidth($value["@content"]) / ($column_width - 1));
    }
    $cell_height        = 5 + 1; // have cells at a height of five so set to six for a padding
    $height_of_cell     = ceil($num_lines * $cell_height); 
    $space_left         = point($setting["height"]) - $pdf->GetY();
    $space_left         -= point($format[$type]["margin-bottom"]);
    // test if height of cell is greater than space left
    if ($height_of_cell >= $space_left) {
        // If this is not just a check, then we can physically "break" the page.
        if ($act_upon) {
            $pdf->Ln ();                        
            $pdf->AddPage (); // page break
            $pdf->SetTopMargin ($point($format[$type]["margin-top"]));
            $pdf->SetLeftMargin ($point($format[$type]["margin-left"]));
            $pdf->SetRightMargin ($point($format[$type]["margin-right"]));
            $pdf->MultiCell (100,5,'','B',2); // this creates a blank row for formatting reasons
        }
        return false;
    } else {
        return true;
    }
}

编辑

我发现 LaTeX 提供了一个 Screenplay 类 (http://www.tug.org/texlive/Contents/live/texmf-dist/doc/latex/screenplay/screenplay.pdf)，但是，我搜索了很远并广泛寻找基于 PHP 的工具将 LaTeX 转换为 PDF，但没有成功。我知道 LaTeX 在服务器端运行，但是我仍然需要基于 PHP 的命令过程才能使用 LaTeX 生成上述 PDF 文件。

此外，在服务器上安装二进制文件、库或工具是禁忌。我可以使用的工具是 PHP 及其内置的功能。任何可以将 LaTex 转换为 PDF 的类或 PHP 工具都非常有用。

最佳答案

鉴于您的要求，我建议您使用在线网络服务来推送您的 LateX 文件并获得已编译的 PDF 作为返回。

这意味着您无需任何编译、无需安装即可获得完整的 PDF 文件，仅基于纯 PHP 网络服务和 API。

有许多在线解决方案，有些是免费的，因此请选择适合您需要的解决方案:Compiling documents online

祝你好运!

关于php - FPDF 和电视/电影剧本格式，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8478720/