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我正在尝试使用 fcimg 和 wkhtmltoimage 将图表导出到 PDF 报告。我不断从 fcimg 收到错误消息，说“致命错误：未捕获的异常 'FCImageException' 并带有消息 'wkhtmltopdf 出现错误'[...]”。

通过调试 de fcimg 库中的函数，我注意到几个负责将 FusionCharts 的缩小 JS 脚本写入文件的“fwrite()”函数返回值“0”（没有写入，但没有错误)，甚至将要写入的字符串正确保存到变量中（如下面的代码）。我不知道的“fwrite”功能是否存在某种限制或限制？以前对该函数的调用工作得很好。任何帮助或建议将不胜感激。

[...]
function fusioncharts_to_image($outputFilePath, $swfName, $inputString, $height, $width, $options = array())
{

$jsonFlag = false;
if($inputString[0] === '<') // Check for the first character
{
    // do nothing. jsonFlag is set to false anyways
}
else if($inputString[0] === "{")
{
    $jsonFlag = true;
}
else
{
    throw new FCImageException("The input string doesn't seem to be either JSON or XML");
}

$fileType = "png";
if(isset($options['imageType']))
    $fileType = $options['imageType'];

$renderDelay = 1000;
if (isset($options['render_delay']) && is_numeric($options['render_delay']))
    $renderDelay = $options['render_delay'];

/*
 * Note: sys_get_temp_dir returns /tmp on Linux (don't know about osx)
 * but on the other hand, it returns C:\user\foo\Local\Temp\ on Windows
 *
 * so we need to add a directory separator on Linux but not on windows
 */
$separator = "";
if(DIRECTORY_SEPARATOR === "/") // check if unix system. TODO: There will be better ways to do this
    $separator = DIRECTORY_SEPARATOR;

$imageFileName = sys_get_temp_dir().$separator."\FCImage".rand(0, 1000).'.'.$fileType;
// $imageFileName = sys_get_temp_dir().”\FCImage”.rand(0, 1000).’.’.$fileType;
// $imageFileName = 'C:\PRUEBA\FCImage'.rand(0, 1000).'.'.$fileType;


$cwd = __DIR__; // change working directory to the current script's directory
$env = array(); // set any environment variables here

// configure the arguments
$args = "--format $fileType";

$args = $args." --crop-w ".($width - 1);
$args = $args." --crop-h ".($height - 1);

if(isset($options['nodelay']))
{
    if($options['nodelay'] === true)
        $args = $args." --javascript-delay 0";
}
else
{
    $args = $args." --javascript-delay {$renderDelay}";
}



if(isset($options['quality']))
{
    $args = $args." --quality {$options['quality']}";
}

$debugFlag = false;
if(isset($options['debug']))
{
    $debugFlag = true;
    $debugFile = fopen("debug.html", "w");
    echo "\n\nCall to:\n fusioncharts_to_image ($outputFilePath, $swfName, [removing input string], $height, $width)";
}

// now, determine the platform this is running on
$os = php_uname("s");
$arch = php_uname("m");
if($os==="Windows NT"){
    $platform = _FC_IMG_PLATFORM_WINDOWS;
    // var_dump($platform);
}
else if($os === "Linux")
{
    if($arch === "i386")
        $platform = _FC_IMG_PLATFORM_LINUX;
    else if($arch === "i686")
        $platform = _FC_IMG_PLATFORM_LINUX;
    else if ($arch === "x86_64")
        $platform = _FC_IMG_PLATFORM_LINUX_64;
    else
        throw new FCImageException ("This Linux architecture is not supported");
}
else if($os === "Darwin") {
    $platform = _FC_IMG_PLATFORM_OSX;
}
else
    throw new FCImageException("Your server OS is currently not supported");

$fcRoot = dirname(__FILE__);

$wkCommand = $platform;

if(isset($options['wkhtmltoimage_path'])) {
    $wkCommand = $options['wkhtmltoimage_path'];
}
$command = "$wkCommand $args - $imageFileName";
// var_dump($command); echo "<br>";

if($debugFlag)
{
    echo "\n Command: $command";
}

$wkstdin = popen($command, "w");
// var_dump($wkstdin);

if(!is_resource($wkstdin))
{
    throw new FCImageException("An error took place while trying to open wkhtmltopdf");
}

$templateHead = <<<TOP
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <title></title>
        <style>
        body{
            padding:0 0 0 0;
            margin:0 0 0 0;
        }
    </style>
    <script>
TOP;

    // ok. write template.txt into the process stdin
    fwrite($wkstdin, $templateHead);

if($debugFlag)
{
    fwrite($debugFile, $templateHead);
}

$contFC = file_get_contents($options['licensed_fusioncharts_js']);
$contFCC = file_get_contents($options['licensed_fusioncharts_charts_js']);
// echo $contFC;
// echo $contFCC;

if(isset($options['licensed_fusioncharts_charts_js']) && isset($options['licensed_fusioncharts_js'])) {

    $temp1 = fwrite($wkstdin, $contFC);
    var_dump($temp1);

    $temp2 = fwrite($wkstdin, $contFCC);
    var_dump($temp2);

    if($debugFlag)
    {
        fwrite($debugFile, file_get_contents($options['licensed_fusioncharts_js']));
    }
    if($debugFlag)
    {
        fwrite($debugFile, file_get_contents($options['licensed_fusioncharts_charts_js']));
    }
}
else {
    throw new FCImageException("Need to provide fusioncharts licensed version here");
}


$functionToCall = "setXMLData";
if($jsonFlag === true)
    $functionToCall = "setJSONData";

// replace all EOL with ""
$escapedData = str_replace("\n", "", $inputString);
$escapedData = addslashes($escapedData);

$templateCode = "</script>
                </head>
                <body>
                <div id='chartContainer'><small>Loading chart...</small></div>
                </body>
                <script>
                FusionCharts.setCurrentRenderer('javascript');
                var chart = new FusionCharts('$swfName', 'chart0', '$width', '$height', '0', '1');
                chart.$functionToCall('$escapedData');
                chart.render('chartContainer');
                </script>
                </html>";
$temp = fwrite($wkstdin, $templateCode);
var_dump($temp);

if($debugFlag)
{
    fwrite($debugFile, $templateCode);
}

$returnCode = pclose($wkstdin);
// echo(var_dump($returnCode)." returnCode");

if($returnCode !== 0)
{
    // var_dump($imageFileName);
    if(file_exists($imageFileName)){
        unlink($imageFileName);
    }
    throw new FCImageException("There was an error with wkhtmltopdf ");
}

// success!
rename($imageFileName, $outputFilePath);

return true;
}
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