public function write()
{
// remove existing apetag
$this->remove();
$engine = new getid3();
$engine->filename = $this->filename;
$engine->fp = fopen($this->filename, 'rb');
$engine->include_module('tag.id3v1');
$engine->include_module('tag.lyrics3');
$tag = new getid3_id3v1($engine);
$tag->Analyze();
$tag = new getid3_lyrics3($engine);
$tag->Analyze();
$apetag = $this->generate_tag();
if (!($fp = @fopen($this->filename, 'a+b'))) {
throw new getid3_exception('Could not open a+b: ' . $this->filename);
}
// init: audio ends at eof
$post_audio_offset = filesize($this->filename);
// lyrics3 tag present
if (@$engine->info['lyrics3']['tag_offset_start']) {
// audio ends before lyrics3 tag
$post_audio_offset = @$engine->info['lyrics3']['tag_offset_start'];
} elseif (@$engine->info['id3v1']['tag_offset_start']) {
// audio ends before id3v1 tag
$post_audio_offset = $engine->info['id3v1']['tag_offset_start'];
}
// seek to end of audio data
fseek($fp, $post_audio_offset, SEEK_SET);
// save data after audio data
$post_audio_data = '';
if (filesize($this->filename) > $post_audio_offset) {
$post_audio_data = fread($fp, filesize($this->filename) - $post_audio_offset);
}
// truncate file before start of new apetag
fseek($fp, $post_audio_offset, SEEK_SET);
ftruncate($fp, ftell($fp));
// write new apetag
fwrite($fp, $apetag, strlen($apetag));
// rewrite data after audio
if (!empty($post_audio_data)) {
fwrite($fp, $post_audio_data, strlen($post_audio_data));
}
fclose($fp);
clearstatcache();
return true;
}
public function remove()
{
$engine = new getid3();
$engine->filename = $this->filename;
$engine->fp = fopen($this->filename, 'rb');
$engine->include_module('tag.lyrics3');
$tag = new getid3_lyrics3($engine);
$tag->Analyze();
if (isset($engine->info['lyrics3']['tag_offset_start']) && isset($engine->info['lyrics3']['tag_offset_end'])) {
if (!($fp = @fopen($this->filename, 'a+b'))) {
throw new getid3_exception('Could not open a+b: ' . $this->filename);
}
// get data after tag
fseek($fp, $engine->info['lyrics3']['tag_offset_end'], SEEK_SET);
$data_after_lyrics3 = '';
if (filesize($this->filename) > $engine->info['lyrics3']['tag_offset_end']) {
$data_after_lyrics3 = fread($fp, filesize($this->filename) - $engine->info['lyrics3']['tag_offset_end']);
}
// truncate file before start of tag and seek to end
ftruncate($fp, $engine->info['lyrics3']['tag_offset_start']);
// rewrite data after tag
if (!empty($data_after_lyrics3)) {
fseek($fp, $engine->info['lyrics3']['tag_offset_start'], SEEK_SET);
fwrite($fp, $data_after_lyrics3, strlen($data_after_lyrics3));
}
fclose($fp);
clearstatcache();
}
// success when removing non-existant tag
return true;
}