What does LA_PRE in php code mean? Solution

What does LA_PRE in php code mean? There is a php code segment, as shown below. I would like to ask LA_PRE. What is this usage. What does code mean? Can you help me explain it? Private & nbsp; $ db; private & nbsp; $ role_table; private & nbsp; $ admin_table; what does LA_PRE in private & nb php code mean?
There is a php code segment, as shown below. I would like to ask LA_PRE. What is this usage. What does code mean? Can you help me explain it?
Private $ db;
Private $ role_table;
Private $ admin_table;
Private $ admin_log;

Function _ construct ()
{
Global $ db;
$ This-> db = $ db;
$ This-> role_table = LA_PRE. 'adminrole ';
$ This-> admin_table = LA_PRE. 'admin ';
$ This-> admin_log = LA_PRE. 'admin _ log ';
}

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This is not a property of php itself, it is a defined constant. here you should refer to the defined table prefix.
------ Solution --------------------
Constant