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Bug with transformsizes and non-numeric values
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Posted by tbuckland@hrdownloads.com  · 14-02-2019 - 21:00

I'm getting a critical error converting a docx document. The error appears to be related to the transformSizes function and occurs in the main transform function when processing the document xml. Other docx files process normally.

I dug into the XML code and found a number of elements that were set to "nil". I'm not certain that this is the source of the issue but I can see this causing potential problems if nil isn't converting to zero.

<w:top w:val="nil"/>

[2019-02-14 19:52:32] development.ERROR: A non-numeric value encountered {"exception":"[object] (ErrorException(code: 0): A non-numeric value encountered at /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTMLDefaultPlugin.php:126)
[stacktrace]
#0 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTMLDefaultPlugin.php(126): Illuminate\\Foundation\\Bootstrap\\HandleExceptions->handleError(2, 'A non-numeric v...', '/home/local.user...', 126, Array)
#1 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(832): Phpdocx\\Transform\\TransformDocAdvHTMLDefaultPlugin->transformSizes('', 'eights')
#2 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(2575): Phpdocx\\Transform\\TransformDocAdvHTML->getCellStyles(Object(DOMElement))
#3 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(362): Phpdocx\\Transform\\TransformDocAdvHTML->transformW_TBL(Object(DOMElement), 'docx_5c65c70079...')
#4 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(1298): Phpdocx\\Transform\\TransformDocAdvHTML->transformXml(Object(DOMElement))
#5 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(421): Phpdocx\\Transform\\TransformDocAdvHTML->transformDEFAULT_TAG(Object(DOMElement), 'docx_5c65c6ff18...')
#6 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(1298): Phpdocx\\Transform\\TransformDocAdvHTML->transformXml(Object(DOMElement))
#7 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(421): Phpdocx\\Transform\\TransformDocAdvHTML->transformDEFAULT_TAG(Object(DOMElement), 'docx_5c65c6ff18...')
#8 /home/local.user/project/vendor/project/phpdocx/Classes/Phpdocx/Transform/TransformDocAdvHTML.php(260): Phpdocx\\Transform\\TransformDocAdvHTML->transformXml(Object(DOMDocument))
#9 /home/local.user/project/Modules/Core/Services/DocConversionService.php(82): Phpdocx\\Transform\\TransformDocAdvHTML->transform(Object(Phpdocx\\Transform\\TransformDocAdvHTMLDefaultPlugin))

Posted by admin  · 15-02-2019 - 07:33

Hello,

DOCX to HTML will support nil values in tables in the next release of phpdocx (there's no release date yet).

We recommend you to generate a new class that extends the TransformDocAdvHTMLDefaultPlugin class:

class TransformDocAdvHTMLNewPlugin extends TransformDocAdvHTMLDefaultPlugin

and customize the transformSizes method to handle nil values if needed, for example:

public function transformSizes($value, $source, $target = null)
{
    $returnValue = 0;

    if ($value == 'nil') {
        $value = 0;
    }
...

The transformation classes allow using custom plugins to transform DOCX. For example, if you generate a new class called TransformDocAdvHTMLHRDownloads with the previous change, you can use it without changing the files of the library:

$transformHTMLPlugin = new TransformDocAdvHTMLHRDownloads();

$transform = new Phpdocx\Transform\TransformDocAdvHTML('document.docx');
$html = $transform->transform($transformHTMLPlugin);

You can read more information about extending TransformDocxAdvHTML classes on https://www.phpdocx.com/documentation/introduction/word-to-html-PHP (How to customize transformations section).

Regards.

Posted by tbuckland@hrdownloads.com  · 15-02-2019 - 20:14

Thanks, that did the trick. The instructions were clear, I was able to add this class and process the problem document.