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Embedhtml using a large amount of memory
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Posted by surveygizmo  · 07-08-2012 - 20:20

Hi,
We use phpdocx to automatically generate word documents for our customers based on their reports.

The problem is embedHTML is using up a large amount of memory in php (~500mb) to generate a word document that only ends up being about 80k.

While we are able to create this word document, for anything larger we hit the server's memory limit. I was wondering if there was someway to stream the document out to a file during embedHTML or if there was some way to limit the memory usage.

Here's our code below along with memory usage dumps:
[code] var_dump(6,memory_get_usage());

$this->endSession();//close the document div
$outputCode = '';
$outputCode .= $this->getBody();//get the html
unset($this->documentBuffer);

var_dump(7,memory_get_usage());

$file = $saveInPath.$fileName;
$docx = new CreateDocx();

var_dump(8,memory_get_usage());

$docx->embedHTML($outputCode, array('parseDivsAsPs' => false, 'downloadImages' => true, 'id' => 'bodyContent'));
unset($outputCode);

var_dump(9,memory_get_usage());

$docx->createDocx($file);

var_dump(10,memory_get_usage());[/code]

And here's the output:
int(6)
int(54476040)
int(7)
int(54476136)
int(8)
int(56217040)
int(9)
int(498491816)
int(10)
int(503589144)

You'll notice how the memory jumps up from 56mb to 498mb between #8 and #9.

Here's a link to the test doc file that was outputted:
[url]http://surveygizmolibrary.s3.amazonaws.com/library/6175/testdoc.docx[/url]

Thanks!
-Chad