<?php
$code="class evalTest{
    function f1(){
        echo 'f1';
        \$this->f2();
    }
    function f2(){
        echo 'f2';
    }
}

\$x=new evalTest();
\$x->f2();
\$x->f1();";


eval($code);
echo 'test';

f2f1f2test