Bug #55691 [Com]: different results from finfo_file and finfo_buffer

Edit report at https://bugs.php.net/bug.php?id=55691&edit=1 ID: 55691 Comment by: magnar at myrtveit dot com Reported by: di_herbert dot huber at yahoo dot com Summary: different results from finfo_file and finfo_buffer Status: No Feedback Type: Bug Package: Filesystem function related Operating System: WinXP HE SP2 PHP Version: 5.3.8 Block user comment: N Private report: N New Comment: To reproduce this bug: Download for example the file http://opendatakit.org/wp-content/uploads/static/sample.xls Run the following code: <?php // Change $FilePath to wherever you stored the downloaded file $FilePath = 'C:/sample.xls'; $Info = new finfo(FILEINFO_MIME_TYPE); echo $Info->file($FilePath); echo ' != '; echo $Info->buffer(file_get_contents($FilePath)); ?> The output will be: application/vnd.ms-excel != application/octet-stream Tested with PHP 7.1 on Windows 10. Previous Comments: ------------------------------------------------------------------------ [2015-09-13 04:22:21] php-bugs at lists dot php dot net No feedback was provided. The bug is being suspended because we assume that you are no longer experiencing the problem. If this is not the case and you are able to provide the information that was requested earlier, please do so and change the status of the bug back to "Re-Opened". Thank you. ------------------------------------------------------------------------ [2015-08-31 18:05:50] cmb@php.net Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. ------------------------------------------------------------------------ [2011-09-17 07:44:26] thomas at partyflock dot nl Happens to me too, and I experience this for an xls/Excel document too. ------------------------------------------------------------------------ [2011-09-14 09:35:36] 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 Test script: --------------- <?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" from finfo_buffer "application/vnd.ms-excel" from finfo_file Actual result: -------------- different results "application/octet-stream" from finfo_buffer "application/vnd.ms-excel" from finfo_file ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=55691&edit=1