Data reading problem of memcached in java and php

I have been using JAVA to read and write memcached without any problems
When I connected with the PHP system today, I could not get the elements stored by PHP, but PHP got the elements stored by JAVA.
Finally, I installed MemAdmin and checked. The Flags of the elements stored in PHP are all 0, while the Flags of the character type stored in Java using the class library are 32. The problem is solved after letting PHP modify the stored Flags.
Comes with the following types of Flags:

Java code

public static final int MARKER_BYTE             = 1;  
public static final int MARKER_BOOLEAN          = 8192;  
public static final int MARKER_INTEGER          = 4;  
public static final int MARKER_LONG             = 16384;  
public static final int MARKER_CHARACTER        = 16;  
public static final int MARKER_STRING           = 32;  
public static final int MARKER_STRINGBUFFER     = 64;  
public static final int MARKER_FLOAT            = 128;  
public static final int MARKER_SHORT            = 256;  
public static final int MARKER_DOUBLE           = 512;  
public static final int MARKER_DATE             = 1024;  
public static final int MARKER_STRINGBUILDER    = 2048;  
public static final int MARKER_BYTEARR          = 4096;