How to Define variables in PHP

How to Define variables in PHP? Not much nonsense & nbsp; paste code directly: & lt ;? Php & nbsp; class & nbsp; DBUtil {& nbsp; private & nbsp; $ dbname0 & nbsp ;& nbsp; 00000; function & nbsp; test () {& nbsp; $ dbname1 & nbsp; 0000001; how to define variables in PHP?
Without much nonsense, paste the code directly:

Class DBUtil {
Private $ dbname0 = '20140901 ';

Function test (){
$ Dbname1 = '20140901 ';
Echo"

{$ Dbname1}

";
// Echo"

{$ This-> $ dbname0}

";
}

}

?>

I call the test method $ dbname1 to print it out normally.

However, the comment below cannot be printed $ dbname0. Which of the following is wrong?

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------ Solution --------------------
Echo"

{$ This-> dbname0}

"