PHP Script: Call Method Dynamically

PHP Script: Call Method Dynamically. Below is PHP Script which describes the full process:

<?php
$fnc = "canCall";
if (!is_callable($fnc)) {
    echo "Cant call method: $fnc <BR>";
} else {
    echo "Return from method $fnc: " . $fnc(15) . "<BR>";
}

$fnc = "canCall2";
if (!is_callable($fnc)) {
    echo "Cant call method: $fnc <BR>";
} else {
    echo "Return from method $fnc: " . $fnc(15) . "<BR>";
}

function canCall($a = 10)
{
    return $a * 5;
}

$caller_class = new CallerClass();
$caller_class->check();

class CallerClass
{
    private $for_method1 = 10;

    public function check()
    {
        $fnc = "method1";
        if (!is_callable(array(&$this, $fnc))) {
            echo "$fnc is not callable function";
        } else {
            $this->{"for_method1"} = 20;
            echo "Return from $fnc:" . $this->{$fnc}() . "<BR>";
        }

        $fnc = "method2";
        if (!is_callable(array(&$this, $fnc))) {
            echo "$fnc is not callable function";
        } else {
            echo "Return from $fnc:" . $this->{$fnc}() . "<BR>";
        }
    }

    public function method1()
    {
        return "From method 1 <$this->for_method1>";
    }
}

?>

Which will output as below:

Return from method canCall: 75
Cant call method: canCall2 
Return from method1:From method 1 <20>
method2 is not callable function