Calculadora PHP

Por qué existe

Calculator — PHP

An arithmetic calculator that submits an HTML form to the server and returns the result. The whole point is that nothing is computed in the browser: the form posts, PHP does the work, the page comes back with the answer. Files

· File · Role ·

· index.html · The form: two numbers and an operation. · · operaciones.php · Reads the POST, validates, computes, reports. · · suma.php · Addition on its own, kept as the simplest case. · Running it

Serve the directory with any PHP-capable server:

Then open What it handles

Input is coerced with floatval, so a non-numeric field becomes 0 rather than an error. Division checks for a zero divisor before dividing and returns a message instead of a warning. State survives the round trip through the session, which is why sessionstart() is the first call in operaciones.php.