A way to add functions outside of evalmath

[jcubic]

RIght now you can only add functions by calling evaluate, there should be a way to add function like this:

$math = new EvalMath();
$math->fn['square'] = function($x) {
    return $x*$x;
};
$math->evaluate('square(10)');

[optimistex]

Альтернативный вариант для достижения той же цели:

    $math = new EvalMath();
    var_dump($math->evaluate('square(x) = x*x'));
    var_dump($math->evaluate('square(10)'));

[koosvanderkolk]

Альтернативный вариант для достижения той же цели: = An alternative for achieving the same goal: :-)

[jcubic]

Yes but what about things like functions that are not possible inside EvalMath like using this library functions and have:

$math = new EvalMath();
$math->fn['gcd'] = function($x) {
    return Algebra::gcd($x);
};
$math->evaluate('square(10)');

or some complicated calculation that's not possible in EvalMath. I've added that function in my fork jcubic/expression.php