I am having trouble translating string concatenation from ASP to PHP. I am using automatic translators and probably the error happens because \ is an escape quote in PHP.
For example,
caminhoMP3 = Application("Root")&"_content\img\musica\musica_"&MusicaIDAux&"\"&ArquivoMP3Aux
is translated
$caminhoMP3 = Application("Root")."_content\img\musica\musica_".$MusicaIDAux."\".$ArquivoMP3Aux;
or
$caminhoMP3=."_content\img\musica\musica_".$MusicaIDAux."\".$ArquivoMP3Aux;