php mp3字符串错误

Question

我有一个 mp3 类来为我的网站阅读 mp3。 (我无法安装该模块，因为它是共享主机)。我上传了 mp3，然后系统使用我的类读取它，并将文件名和位置以及基本标签(艺术家、歌曲名称、专辑)插入到我的 mysql 中。 mysql 插入没问题，但我插入的字符串有问题。

这是我的代码:http://pastebin.com/fXsm0c3T

<?php



class Id3 {



  private $tags = array(

      'TALB' => 'album', 'TCON' => 'genre', 'TENC' => 'encoder',

     'TIT2' => 'title', 'TPE1' => 'artist', 'TPE2' => 'ensemble', 'TYER' => 'year', 'TCOM' => 'composer', 

      'TCOP' => 'copyright', 'TRCK' => 'track', 'WXXX' => 'url',

        'COMM' => 'comment'

    );



    private $genre = array(

        0   => 'Blues', 1   => 'Classic Rock', 2   => 'Country', 3   => 'Dance', 4   => 'Disco', 5   => 'Funk', 6   => 'Grunge', 7   => 'Hip-Hop', 8   => 'Jazz', 9   => 'Metal', 10  => 'New Age', 11  => 'Oldies', 12  => 'Other',

    13  => 'Pop', 14  => 'R&B', 15  => 'Rap', 16  => 'Reggae', 17  => 'Rock', 18  => 'Techno', 19  => 'Industrial', 20  => 'Alternative', 21  => 'Ska', 22  => 'Death Metal', 23  => 'Pranks', 24  => 'Soundtrack', 25  => 'Euro-Techno', 26  => 'Ambient', 27  => 'Trip-Hop', 28  => 'Vocal',

        29  => 'Jazz+Funk', 30  => 'Fusion', 31  => 'Trance', 32  => 'Classical', 33  => 'Instrumental', 34  => 'Acid', 35  => 'House',

        36  => 'Game', 37  => 'Sound Clip', 38  => 'Gospel', 39  => 'Noise', 40  => 'Alternative Rock', 41  => 'Bass', 42  => 'Soul', 43  => 'Punk', 44  => 'Space', 45  => 'Meditative', 46  => 'Instrumental Pop', 47  => 'Instrumental Rock', 48  => 'Ethnic',

            49  => 'Gothic', 50  => 'Darkwave', 51  => 'Techno-Industrial', 52  => 'Electronic', 53  => 'Pop-Folk', 54  => 'Eurodance', 55  => 'Dream', 56  => 'Southern Rock', 57  => 'Comedy', 58  => 'Cult', 59  => 'Gangsta', 60  => 'Top 40', 61  => 'Christian Rap', 62  => 'Pop/Funk', 63  => 'Jungle', 64  => 'Native US', 65  => 'Cabaret', 66  => 'New Wave', 67  => 'Psychadelic', 68  => 'Rave', 69  => 'Showtunes', 70  => 'Trailer', 71  => 'Lo-Fi', 72  => 'Tribal', 73  => 'Acid Punk', 74  => 'Acid Jazz', 75  => 'Polka', 76  => 'Retro', 77  => 'Musical', 78  => 'Rock & Roll', 79  => 'Hard Rock', 80  => 'Folk', 81  => 'Folk-Rock', 82  => 'National Folk', 83  => 'Swing', 84  => 'Fast Fusion', 85  => 'Bebob', 86  => 'Latin',

        87  => 'Revival', 88  => 'Celtic', 89  => 'Bluegrass', 90  => 'Avantgarde', 91  => 'Gothic Rock', 92  => 'Progressive Rock', 93  => 'Psychedelic Rock', 94  => 'Symphonic Rock', 95  => 'Slow Rock', 96  => 'Big Band', 97  => 'Chorus', 98  => 'Easy Listening', 99  => 'Acoustic',

          100 => 'Humour', 101 => 'Speech', 102 => 'Chanson', 103 => 'Opera', 104 => 'Chamber Music', 105 => 'Sonata', 106 => 'Symphony', 107 => 'Booty Bass', 108 => 'Primus', 109 => 'Porn Groove', 110 => 'Satire', 111 => 'Slow Jam', 112 => 'Club',

     113 => 'Tango', 114 => 'Samba', 115 => 'Folklore', 116 => 'Ballad', 117 => 'Power Ballad', 118 => 'Rhytmic Soul', 119 => 'Freestyle', 120 => 'Duet', 121 => 'Punk Rock', 122 => 'Drum Solo', 123 => 'Acapella', 124 => 'Euro-House',

        125 => 'Dance Hall', 126 => 'Goa', 127 => 'Drum & Bass', 128 => 'Club-House', 129 => 'Hardcore', 130 => 'Terror', 131 => 'Indie', 132 => 'BritPop', 133 => 'Negerpunk', 134 => 'Polsk Punk', 135 => 'Beat', 136 => 'Christian Gangsta Rap', 137 => 'Heavy Metal', 138 => 'Black Metal', 139 => 'Crossover', 140 => 'Contemporary Christian', 141 => 'Christian Rock', 142 => 'Merengue', 143 => 'Salsa', 144 => 'Trash Metal', 145 => 'Anime', 146 => 'Jpop', 147 => 'Synthpop'

        );



    public function __construct() {

        $this->info = '';

    }



    private function getId3() {

     $handle = fopen($this->file, 'r');

            $head = fread($handle,10);

            $head = unpack("a3signature/c1version_major/c1version_minor/c1flags/Nsize", $head);

      $result = array();

    for ($i = 0; $i<5; $i++){

            $tag = trim(fread($handle, 6));

            if (!isset($this->tags[$tag])) continue;        

      $size = fread($handle, 2);

            $size = unpack('n', $size); $size = $size[1]+2;

      $value = fread($handle, $size);   

       $this->info[$this->tags[$tag]] = $value;

        }        fclose($handle);

    }



    public function load($file) {

        $this->file = $file; $this->getId3(); } 

}





$id3 = new Id3();

  $id3->load('mp3.mp3');

print_R($id3->info);

现在，当我读取值时，我得到了这个:

Array
(
    [genre] => ��Rock
    [title] => ��Walk
    [artist] => ��Foo Fighters
    [album] => ��Wasting Light
)

我的代码有什么问题？

Answer 1

根据您的代码，$value 需要修剪或转换为 UTF(我更喜欢转换为 UTF)。我添加了检查哪个 UTF 是 mp3 并正确解析的函数:

$value = $this->filter($value, $tag); // convert to UTF or else that is why you have weird chars

这是 readable code .

<?php

class Id3 {

  private $tags = array(
    'TALB' => 'album',
    'TCON' => 'genre',
    'TENC' => 'encoder',
    'TIT2' => 'title',
    'TPE1' => 'artist',
    'TPE2' => 'ensemble',
    'TYER' => 'year',
    'TCOM' => 'composer',
    'TCOP' => 'copyright',
    'TRCK' => 'track',
    'WXXX' => 'url',
    'COMM' => 'comment'
  );

  private $genre = array(
    0   => 'Blues',
    1   => 'Classic Rock',
    2   => 'Country',
    3   => 'Dance',
    4   => 'Disco',
    5   => 'Funk',
    6   => 'Grunge',
    7   => 'Hip-Hop',
    8   => 'Jazz',
    9   => 'Metal',
    10  => 'New Age',
    11  => 'Oldies',
    12  => 'Other',
    13  => 'Pop',
    14  => 'R&B',
    15  => 'Rap',
    16  => 'Reggae',
    17  => 'Rock',
    18  => 'Techno',
    19  => 'Industrial',
    20  => 'Alternative',
    21  => 'Ska',
    22  => 'Death Metal',
    23  => 'Pranks',
    24  => 'Soundtrack',
    25  => 'Euro-Techno',
    26  => 'Ambient',
    27  => 'Trip-Hop',
    28  => 'Vocal',
    29  => 'Jazz+Funk',
    30  => 'Fusion',
    31  => 'Trance',
    32  => 'Classical',
    33  => 'Instrumental',
    34  => 'Acid',
    35  => 'House',
    36  => 'Game',
    37  => 'Sound Clip',
    38  => 'Gospel',
    39  => 'Noise',
    40  => 'Alternative Rock',
    41  => 'Bass',
    42  => 'Soul',
    43  => 'Punk',
    44  => 'Space',
    45  => 'Meditative',
    46  => 'Instrumental Pop',
    47  => 'Instrumental Rock',
    48  => 'Ethnic',
    49  => 'Gothic',
    50  => 'Darkwave',
    51  => 'Techno-Industrial',
    52  => 'Electronic',
    53  => 'Pop-Folk',
    54  => 'Eurodance',
    55  => 'Dream',
    56  => 'Southern Rock',
    57  => 'Comedy',
    58  => 'Cult',
    59  => 'Gangsta',
    60  => 'Top 40',
    61  => 'Christian Rap',
    62  => 'Pop/Funk',
    63  => 'Jungle',
    64  => 'Native US',
    65  => 'Cabaret',
    66  => 'New Wave',
    67  => 'Psychadelic',
    68  => 'Rave',
    69  => 'Showtunes',
    70  => 'Trailer',
    71  => 'Lo-Fi',
    72  => 'Tribal',
    73  => 'Acid Punk',
    74  => 'Acid Jazz',
    75  => 'Polka',
    76  => 'Retro',
    77  => 'Musical',
    78  => 'Rock & Roll',
    79  => 'Hard Rock',
    80  => 'Folk',
    81  => 'Folk-Rock',
    82  => 'National Folk',
    83  => 'Swing',
    84  => 'Fast Fusion',
    85  => 'Bebob',
    86  => 'Latin',
    87  => 'Revival',
    88  => 'Celtic',
    89  => 'Bluegrass',
    90  => 'Avantgarde',
    91  => 'Gothic Rock',
    92  => 'Progressive Rock',
    93  => 'Psychedelic Rock',
    94  => 'Symphonic Rock',
    95  => 'Slow Rock',
    96  => 'Big Band',
    97  => 'Chorus',
    98  => 'Easy Listening',
    99  => 'Acoustic',
    100 => 'Humour',
    101 => 'Speech',
    102 => 'Chanson',
    103 => 'Opera',
    104 => 'Chamber Music',
    105 => 'Sonata',
    106 => 'Symphony',
    107 => 'Booty Bass',
    108 => 'Primus',
    109 => 'Porn Groove',
    110 => 'Satire',
    111 => 'Slow Jam',
    112 => 'Club',
    113 => 'Tango',
    114 => 'Samba',
    115 => 'Folklore',
    116 => 'Ballad',
    117 => 'Power Ballad',
    118 => 'Rhytmic Soul',
    119 => 'Freestyle',
    120 => 'Duet',
    121 => 'Punk Rock',
    122 => 'Drum Solo',
    123 => 'Acapella',
    124 => 'Euro-House',
    125 => 'Dance Hall',
    126 => 'Goa',
    127 => 'Drum & Bass',
    128 => 'Club-House',
    129 => 'Hardcore',
    130 => 'Terror',
    131 => 'Indie',
    132 => 'BritPop',
    133 => 'Negerpunk',
    134 => 'Polsk Punk',
    135 => 'Beat',
    136 => 'Christian Gangsta Rap',
    137 => 'Heavy Metal',
    138 => 'Black Metal',
    139 => 'Crossover',
    140 => 'Contemporary Christian',
    141 => 'Christian Rock',
    142 => 'Merengue',
    143 => 'Salsa',
    144 => 'Trash Metal',
    145 => 'Anime',
    146 => 'Jpop',
    147 => 'Synthpop'
  );
  private $file;
  private $info;

  public function __construct() {
    $this->info = array(
      'genre' => 'unknow',
      'title' => 'unknow',
      'artist' => 'unknow',
      'album' => 'unknow',
    );
  }

  private function filter($tag, $type) {
    if ($type == 'COMM') {
      $tag = substr($tag, 0, 3) . substr($tag, 10);
    }
    if(ord($tag[2]) == 0) {
      return iconv('UTF-8', 'ISO-8859-1', substr($tag, 3));
    }
    elseif(ord($tag[2]) == 1) {
      return iconv('UTF-16LE', 'UTF-8', substr($tag, 5));
    }
    elseif(ord($tag[2]) == 2) {
      return iconv('UTF-16BE', 'UTF-8', substr($tag, 5));
    }
    elseif(ord($tag[2]) == 3) {
      return substr($tag, 3);
    }
    return false;
  }

  private function getId3() {
    $handle = fopen($this->file, 'rb');
    $head = fread($handle, 10);
    $head = unpack("a3signature/c1version_major/c1version_minor/c1flags/Nsize", $head);
    if (!$head['signature'] == 'ID3') {
      fclose($handle);
      return false;
    }
    $result = array();
    for ($i = 0; $i < 22; $i++) { //22 most popular tags, you had 5 therefore only the first five.
      $tag = rtrim(fread($handle, 6));
      if (!isset($this->tags[$tag])) {
        continue;
      }
      $size = fread($handle, 2);
      $size = unpack('n', $size);
      $size = $size[1]+2;
      $value = fread($handle, $size);
      $value = $this->filter($value, $tag); // convert to UTF or else that is why you have weird chars
      $this->info[$this->tags[$tag]] = $value;
    }
    fclose($handle);
  }

  public function load($file) {
    $this->file = $file;
    $this->getId3();
  }

  public function getInfo() {
    return $this->info;
  }

}

$id3 = new Id3();
$id3->load('mp3.mp3');
print_R($id3->getInfo());

要获取有关标签的更多信息，请阅读此 Wiki 文章:http://en.wikipedia.org/wiki/ID3