I currently have this
file_put_contents($tmpfile, $attachments[0][\'body\']);
$objPHPExcel = PHPExcel_IOFactory::load($tmpfile);
The file I
PHPExcel provides no direct method for loading from a string rather than from a file. As an alternative to actually creating a physical filesystem file for $tmpfile though, you might be able to use php://memory or php://temp
You must first create a reader for the excel file and then load that file from your constructed reader. Take a look at this for full details.
This might not be the most elegant solution but here is how I solved it:
public function fromString($data=null)
{
$file = tempnam(sys_get_temp_dir(), 'excel_');
$handle = fopen($file, "w");
fwrite($handle, $data);
$return = \PHPExcel_IOFactory::load($file);
fclose($handle);
unlink($file);
return $return;
}