File type detection patch.

Changelog excerpt:
- Added MP4 file type detection and modified PHP file type detection to
  reduce the risk of false positives (e.g., see phpMussel/phpMussel#241).

Author: Maikuolan

Changelog.md

@@ -151,3 +151,4 @@ __*Why "v3.0.0" instead of "v1.0.0?"*__ Prior to phpMussel v3, the "phpMussel Co
 - [2024.09.13]: Added L10N for Malayalam.
 - [2024.10.15]: Added support to optionally disable adding new hash cache entries when a specific instance cache flag is used.
 - [2024.10.15]: Added support to inform the user via an optional instance cache flag which flags were set by the switch file during the scan when scanning via CLI.
+- [2024.10.15]: Added MP4 file type detection and modified PHP file type detection to reduce the risk of false positives (e.g., see phpMussel/phpMussel#241).

assets/switch.dat

@@ -15,10 +15,10 @@ FD:d9d505f920a163d7:A:8;infectable=false
 FD:fffb90:A:3;infectable=false
 
 == Assists with determining potential file content ==
+$fileswitch:unassigned;FN:\.[Mm][Pp]?4.?$;FD-RX:63(686170|6c6970|72676e|746162)|66726565|66747970|696d6170|6a7032|6b6d6174|6c6f6164|6d(617474|646174|6f6f66|6f6f76)|70696374|706e6f74|73(637074|6b6970|737263|796e63)|746d6364|75647461|75756964|77696465:4:4;fileswitch=mp4
 $fileswitch:unassigned;FD:4d5a:A:2;fileswitch=pefile
 $fileswitch:unassigned;FD-RX:(cafebabe|cafed00d|cefaedfe|cffaedfe|feedface|feedfacf):A:4;fileswitch=java
-$fileswitch:unassigned;FD:494433:A:3;fileswitch=mp3
-$fileswitch:unassigned;FD:fffb90:A:3;fileswitch=mp3
+$fileswitch:unassigned;FD-RX:494433|fffb90:A:3;fileswitch=mp3
 $fileswitch:unassigned;FD-NORM-RX:23212f7573722f(6c6f63616c2f)?62696e2f(656e76)?7065726c:A:24;fileswitch=perl
 $fileswitch:unassigned;FD:43723234:A:4;fileswitch=chrome
 $fileswitch:unassigned;FD:4c00000001140200:A:8;fileswitch=lnk

src/Scanner.php

@@ -1687,7 +1687,7 @@ private function dataHandler(string $str = '', int $Depth = 0, string $OriginalF
             strpos(',phar,', ',' . $gzxt . ',') === false &&
             strpos(',php*,', ',' . $gzxts . ',') === false &&
             strpos($str_hex_norm, '3c3f706870') === false
-        ) || $is_pe);
+        ) || $is_pe || $fileswitch === 'mp4');
 
         /** Set debug values, if this has been enabled. */
         if (isset($this->debugArr)) {