[Release] [PHP] [OOP] Calculator

[iGalaxy]

Hello everyone, I was practicing OOP PHP, and I ended up with an OOP PHP Calculator! So here is the source:

<?php
class Calculater {
	public function add($num1, $num2) {
		$total = $num1 + $num2;
		echo $total;
	}
	public function substract($num1, $num2) {
		$total = $num1 - $num2;
		echo $total;
	}
	public function multiply($num1, $num2) {
		$total = $num1 * $num2;
		echo $total;
	}
	public function divide($num1, $num2) {
		$total = $num1 / $num2;
		echo $total;
	}
}
$Calculate = new Calculater;
if(isset($_REQUEST['submit'])) {
	$num1 = $_POST['num1'];
	$num2 = $_POST['num2'];
	if(!ctype_digit($num1)) {
		echo "Error: Your inputs may only contain numbers";
		exit();
	}
	if(!ctype_digit($num2)) {
		echo "Error: Your inputs may only contain numbers";
		exit();
	}
	$operation = $_POST['operation'];
	if($operation == "Add") {
		$Calculate->add($num1, $num2);
	}
	if($operation == "Substract") {
		$Calculate->substract($num1, $num2);
	}
	if($operation == "Multiply") {
		$Calculate->multiply($num1, $num2);
	}
	if($operation == "Divide") {
		$Calculate->divide($num1, $num2);
	}
}
?>
<form method="post" action="" name="submit">
<input type="text" name="num1">
<input type="text" name="num2">
<select name="operation">
	<option>Add</option>
	<option>Substract</option>
	<option>Multiply</option>
	<option>Divide</option>
</select>
<input type="submit" name="submit" value="Submit">
</form>

Copy paste the above code in a *.php file and save it. In-order to run it you need an Apache server. Hope you like the release! Please give me ideas to release something the next time because I am always looking to code something and release it! Please give me feed back if you have ideas on improving my code!

[MentaL]

[Dave]

- I don't really see how this is OOP, you only created a class with 4 functions.
- You have to return in functions, not echo values.
- $_REQUEST > $_POST.
- Switch statement for the operation part may look neater.
- Your <option>'s do not have any value bound to it. (<option value="add">).

Make it so that I can do multiple calculations at once, instead of making it possible to add/subtract/multiply/divide 2 values only.

[iGalaxy]

@Dave further explanation would be really good.

[jur13n]

@Dave further explanation would be really good.

Further explanation:
You're a fucking idiot if you can't understand what he said.
And you claim to code OOP?

[KristiansJ]

Hello everyone, I was practicing OOP PHP, and I ended up with an OOP PHP Calculator!
[/code]

Copy paste the above code in a *.php file and save it. In-order to run it you need an Apache server. Hope you like the release! Please give me ideas to release something the next time because I am always looking to code something and release it! Please give me feed back if you have ideas on improving my code!

[iGalaxy]

@jur13n I wanted to know about multiple calculations at once.

[jur13n]

@jur13n I wanted to know about multiple calculations at once.

simple.
get the string that has been posted, add the rest.
recalculate..

[iGalaxy]

oh....