Parse and convert Kugou krc lyrics into lrc lyrics php source code_PHP tutorial

Recently, when I was collecting lyrics from Kugou Music, I found that the lyrics of Kugou Music were all "garbled" when I browsed them directly. The lyrics I usually see are all text in lrc format. This kind of krc format is dedicated to Kugou. It has obviously been specially processed. I usually listen to music with Kugou and I don’t look carefully at the differences in the lyrics. However, unlike Tiantianjingting, etc., the lyrics can be highlighted word by word.

Decompile Kugou’s flash player and find this krc-decrypted ActionScript code:

public function loaderCompleteHandler(param1:ByteArray) : void{ 
 this.newkeyBytes = [64, 71, 97, 119, 94, 50, 116, 71, 81, 54, 49, 45, 206, 210, 110, 105]; 
 var result:* = param1; 
 var krcBytes:* = new ByteArray(); 
 result.position = 4; 
 result.readBytes(krcBytes); 
 var l:* = krcBytes.length; 
 var i:int; 
 while (i < l) {
 krcBytes[i] = krcBytes[i] ^ this.newkeyBytes[i % this.newkeyBytes.length]; 
 i = (i + 1); 
 }
 try { 
 krcBytes.uncompress(); 
 } catch (error:SecurityError) { 
 errorfun("uncompressError");
 return; 
 } 
 krcBytes.position = 0; 
 this.myLyric.dataStr = krcBytes.readUTFBytes(krcBytes.length); 
 this.successfun(); 
 return; 
}

According to this code, it can be quickly converted into PHP parsing code:

$enKey = array(64, 71, 97, 119, 94, 50, 116, 71, 81, 54, 49, 45, 206, 210, 110, 105);
$krc_content = substr($krc_content,4);
$len = strlen($krc_content);
$krc_compress = '';
for ($k = 0; $k < $len; $k++){
 $krc_compress .= chr(ord($krc_content[$k]) ^ $enKey[$k % 16]);
}
$krc_text = gzuncompress($krc_compress);

The above $krc_content is the compressed and encrypted text content of krc lyrics. The parsed krc plain text lyrics $krc_text is obtained, and then it can be easily converted into lrc lyrics, as follows:

function krc2lrc($krc_content,$glue = "n"){
 $enKey = array(64, 71, 97, 119, 94, 50, 116, 71, 81, 54, 49, 45, 206, 210, 110, 105);
 $krc_content = substr($krc_content,4);
 $len = strlen($krc_content);
 $krc_compress = '';
 for ($k = 0; $k < $len; $k++){
 $krc_compress .= chr(ord($krc_content[$k]) ^ $enKey[$k % 16]);
 }
 $krc_text = gzuncompress($krc_compress);
 preg_match_all("/[(ar|ti|offset):(.+)]/",$krc_text,$matches);
 $lrc_text = implode($glue,$matches[0]).$glue;
 preg_match_all("/[(d{0,8}),(d{0,8})](.+)/",$krc_text,$matches);
 unset($krc_text,$krc_compress,$krc_content,$enKey);
 if(!empty($matches[1])){
 foreach($matches[1] as $k=>$v){
 list($seconds, $millis) = explode('.', $v / 1000); 
 $lrc_time = date('i:s',1388534400 + $seconds).'.'.substr($millis,0,2);
 $lrc_cont = preg_replace("/<d{1,8},d{1,8},d{1,8}>/",'',$matches[3][$k]);
 $lrc_text .= "[{$lrc_time}]{$lrc_cont}{$glue}";
 }
 }
 return $lrc_text;
}

A simple example is as follows:

$content = file_get_contents('1.krc');
echo krc2lrc($content,'<br/>');

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