<?php

class test {
    function __construct(){}

    private function test1(){
        echo "In test1", PHP_EOL;
    }
    private function test2(){
        echo "test2", PHP_EOL;
    }
    protected function test3(){
        return "test3" . PHP_EOL;
    }
    public function __call($method,$arguments) {
        if(method_exists($this, $method)) {
            $this->test1();
            return call_user_func_array(array($this,$method),$arguments);
        }
    }
}

$a = new test;
$a->test2();
echo $a->test3();
/*
 * Output:
 * In test1
 * test2
 * In test1
 * test3
 */