Bug #59913 [Opn->Fbk]: different results from finfo_file and finfo_buffer

Edit report at https://bugs.php.net/bug.php?id=59913&edit=1 ID: 59913 Updated by: ab@php.net Reported by: di_herbert dot huber at yahoo dot com Summary: different results from finfo_file and finfo_buffer -Status: Open +Status: Feedback Type: Bug -Package: Fileinfo +Package: *General Issues Operating System: WinXP HE2002 SP2 PHP Version: 5.3.5 Block user comment: N Private report: N New Comment: Long ago, still the exact file would be needed, to reproduce and fix the bug. Thanks. Previous Comments: ------------------------------------------------------------------------ [2011-08-28 11:23:16] di_herbert dot huber at yahoo dot com Description: ------------ different results from finfo_file and finfo_buffer Scenario: 1. MS Excel-File stored in mySQL database LONGBLOB-Column 2. This binary data selected from database 3. This binary data stored to tempfile 4. mime-type sniffing done by finfo_buffer on binary data > result: application/octet-stream 5. mime-type sniffing done by finfo_file on tempfile > result: application/vnd.ms-excel PROBLEM: different result, dependent on used Fileinfo Function Comment: The tempfile has NO extension like ".xls" that could be used as hint for mimetype-sniffing Reproduce code: --------------- <?PHP ... $tempFileName = tempnam(sys_get_temp_dir(), "tempfile"); $tempFileHandle = fopen($tempFileName, "w"); fwrite($tempFileHandle, $attrib); fclose($tempFileHandle); // ensure that "extension=php_fileinfo.dll" is enabled in php.ini $finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type ala mimetype extension $fileContentsTypeBuf = finfo_buffer($finfo, $attrib, FILEINFO_MIME_TYPE); $fileContentsType = finfo_file($finfo, $tempFileName); finfo_close($finfo); ... Expected result: ---------------- same result "application/vnd.ms-excel", independent from used Fileinfo Function (finfo_buffer or finfo_file) Actual result: -------------- different results "application/octet-stream" for finfo_buffer "application/vnd.ms-excel" for finfo_file ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=59913&edit=1