Bug #75887 [Nab]: mime type detection problem

Edit report at https://bugs.php.net/bug.php?id=75887&edit=1 ID: 75887 Updated by: requinix@php.net Reported by: tunderzone at gmail dot com Summary: mime type detection problem Status: Not a bug Type: Bug Package: Filesystem function related PHP Version: 7.1.13 Block user comment: N Private report: N New Comment: PHP's bundled information comes from the libmagic library, which has a rule that says to scan lines for ".text" and mark the content as text/x-asm if found. https://github.com/file/file/blob/master/magic/Magdir/assembler So the bundled magic database isn't working for you. Try with your system's - probably /usr/share/misc/magic. $info = finfo_open(FILEINFO_MIME_TYPE, "/usr/share/misc/magic"); Previous Comments: ------------------------------------------------------------------------ [2018-01-30 11:37:19] tunderzone at gmail dot com the text that cause this is not on first line nor last. it is somewhere in the middle of the file. the file size is 14K. running finfo_open and finfo_file on that file in php 5.5.38 yields text/plain but in php7.1.13 yields text/x-asm something has changed from php 5 to php 7. this is why i posted this bug. ------------------------------------------------------------------------ [2018-01-29 23:29:15] requinix@php.net MIME detection works by examining the first few bytes of a file (or input stream). It is not perfect. ------------------------------------------------------------------------ [2018-01-29 21:21:43] tunderzone at gmail dot com Description: ------------ having ".text" as first characters on any line of a css file will result in mime being resolved as text/x-asm. Test script: --------------- <?php $info = finfo_open(FILEINFO_MIME_TYPE); $tipe = finfo_buffer($info, '.text {color: #CCCCCC;}'); var_dump($tipe); finfo_close($info); Expected result: ---------------- text/css or text/plain Actual result: -------------- text/x-asm ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75887&edit=1