请问java的ByteArrayOutputStream,GZIPOutputStream如何转成php
byte[] bArr2 = str.getBytes("UTF-8");
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(8192);
GZIPOutputStream gZIPOutputStream = new GZIPOutputStream(byteArrayOutputStream);
gZIPOutputStream.write(bArr2);
gZIPOutputStream.close();
bArr2 = byteArrayOutputStream.toByteArray();
请问php如何实现,得到bArr2的值。