Description:
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We use PHP 5.3.14

Sometimes ajax post to a PHP page, results in $_SERVER content-length to be set 
correctly, but the $_POST does not have all data. I have also tested php://input 
to see if the data was received. But the data was truncated. This is NOT a file 
upload.

The data could be of 1000-5000 chars. But only 400-600 chars are received.

This is intermittent.

Could be similar to https://bugs.php.net/bug.php?id=22427

Expected result:
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The post values submitted by ajax request should be available in $_POST.

Actual result:
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The post value is truncated.