read id3 tags from mp3 file

diff --git a/classes/id3-tag-reader.php b/classes/id3-tag-reader.php
new file mode 100644 (file)
index 0000000..21302a2
--- /dev/null
+++ b/classes/id3-tag-reader.php
@@ -0,0 +1,156 @@
+<?php
+/**
+ *  dolphin. Collection of useful PHP skeletons.
+ *  Copyright (C) 2009  Johannes 'Banana' Keßler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the COMMON DEVELOPMENT AND DISTRIBUTION LICENSE
+ *
+ * You should have received a copy of the
+ * COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+ * along with this program.  If not, see http://www.sun.com/cddl/cddl.html
+ */
+
+/**
+ * read the id3 tags from a mp3 file
+ * base on : http://www.script-tutorials.com/id3-tags-reader-with-php/
+ */
+class ID3TagsReader {
+
+    // variables
+    var $aTV23 = array( // array of possible sys tags (for last version of ID3)
+        'TIT2',
+        'TALB',
+        'TPE1',
+        'TPE2',
+        'TRCK',
+        'TYER',
+        'TLEN',
+        'USLT',
+        'TPOS',
+        'TCON',
+        'TENC',
+        'TCOP',
+        'TPUB',
+        'TOPE',
+        'WXXX',
+        'COMM',
+        'TCOM'
+    );
+    var $aTV23t = array( // array of titles for sys tags
+        'Title',
+        'Album',
+        'Author',
+        'AlbumAuthor',
+        'Track',
+        'Year',
+        'Length', # Lenght
+        'Lyric',
+        'Desc',
+        'Genre',
+        'Encoded',
+        'Copyright',
+        'Publisher',
+        'OriginalArtist',
+        'URL',
+        'Comments',
+        'Composer'
+    );
+    var $aTV22 = array( // array of possible sys tags (for old version of ID3)
+        'TT2',
+        'TAL',
+        'TP1',
+        'TRK',
+        'TYE',
+        'TLE',
+        'ULT'
+    );
+    var $aTV22t = array( // array of titles for sys tags
+        'Title',
+        'Album',
+        'Author',
+        'Track',
+        'Year',
+        'Length', # Lenght
+        'Lyric'
+    );
+
+    // constructor
+    function __construct() {
+       }
+
+    // functions
+    function getTagsInfo($sFilepath) {
+        // read source file
+        $iFSize = filesize($sFilepath);
+        $vFD = fopen($sFilepath,'r');
+        $sSrc = fread($vFD,$iFSize);
+        fclose($vFD);
+
+        // obtain base info
+        if (substr($sSrc,0,3) == 'ID3') {
+            $aInfo['FileName'] = $sFilepath;
+            $aInfo['Version'] = hexdec(bin2hex(substr($sSrc,3,1))).'.'.hexdec(bin2hex(substr($sSrc,4,1)));
+        }
+
+        // passing through possible tags of idv2 (v3 and v4)
+        if ($aInfo['Version'] == '4.0' || $aInfo['Version'] == '3.0') {
+            for ($i = 0; $i < count($this->aTV23); $i++) {
+                if (strpos($sSrc, $this->aTV23[$i].chr(0)) != FALSE) {
+
+                    $s = '';
+                    $iPos = strpos($sSrc, $this->aTV23[$i].chr(0));
+                    $iLen = hexdec(bin2hex(substr($sSrc,($iPos + 5),3)));
+
+                    $data = substr($sSrc, $iPos, 9 + $iLen);
+                    for ($a = 0; $a < strlen($data); $a++) {
+                        $char = substr($data, $a, 1);
+                        if ($char >= ' ' && $char <= '~')
+                            $s .= $char;
+                    }
+                    if (substr($s, 0, 4) == $this->aTV23[$i]) {
+                        $iSL = 4;
+                        if ($this->aTV23[$i] == 'USLT') {
+                            $iSL = 7;
+                        } elseif ($this->aTV23[$i] == 'TALB') {
+                            $iSL = 5;
+                        } elseif ($this->aTV23[$i] == 'TENC') {
+                            $iSL = 6;
+                        }
+                        $aInfo[$this->aTV23t[$i]] = substr($s, $iSL);
+                    }
+                }
+            }
+        }
+
+        // passing through possible tags of idv2 (v2)
+        if($aInfo['Version'] == '2.0') {
+            for ($i = 0; $i < count($this->aTV22); $i++) {
+                if (strpos($sSrc, $this->aTV22[$i].chr(0)) != FALSE) {
+
+                    $s = '';
+                    $iPos = strpos($sSrc, $this->aTV22[$i].chr(0));
+                    $iLen = hexdec(bin2hex(substr($sSrc,($iPos + 3),3)));
+
+                    $data = substr($sSrc, $iPos, 6 + $iLen);
+                    for ($a = 0; $a < strlen($data); $a++) {
+                        $char = substr($data, $a, 1);
+                        if ($char >= ' ' && $char <= '~')
+                            $s .= $char;
+                    }
+
+                    if (substr($s, 0, 3) == $this->aTV22[$i]) {
+                        $iSL = 3;
+                        if ($this->aTV22[$i] == 'ULT') {
+                            $iSL = 6;
+                        }
+                        $aInfo[$this->aTV22t[$i]] = substr($s, $iSL);
+                    }
+                }
+            }
+        }
+        return $aInfo;
+    }
+}
+
+?>
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