PHPOffice/PHPExcel — pull request #83 by amironov (2012-11-20 11:25:03+00:00)
Title: Use mkdtemp in PHPExcel_Shared_ZipArchive to avoid race condition

When use Excel2007 writer with PHPExcel_Settings::PCLZIP files with same name placed in one temporary directory. Two parallel scripts can interfere with each other.