tomlins95/gist:5e8af36e56ff587df804

## gistfile1.txt
<?php

/* ======================================================
   PHP Calculator example using "sticky" form (Version 1)
   ======================================================

   Author : P Chatterjee (adopted from an original example written by C J Wallace)

   Purpose : To multiply 2 numbers passed from a HTML form and display the result.

   input:
      x, y : numbers
      calc : Calculate button pressed


   Date: 15 Oct 2007

*/

// grab the form values from $_HTTP_POST_VARS hash
extract($_GET);

// first compute the output, but only if data has been input
   if(isset($calc)) { // $calc exists as a variable
      $prod = $x * $y;
   }
	elseif(isset($Add)) {
		$prod = $x + $y;
		}

	elseif(isset($Subtract)) {
		$prod = $x - $y;
		}

	elseif(isset($Multiply)) {
		$prod = $x * $y;
		}

	elseif(isset($Divide)) {
		$prod = $x / $y;
		}

   else { // set defaults
      $x=0;
      $y=0;
      $prod=0;
   }
?>

<html>
   <head>
      <title>PHP Calculator Example</title>
   </head>

   <body>

      <h3>PHP Calculator (Version 1)</h3>
      <p>Multiply two numbers and output the result</p>

      <form method="get" action="<?php print $_SERVER['PHP_SELF']; ?>">

         x = <input type="text" name="x" size="5" value="<?php print $x; ?>"/>
         y =  <input type="text" name="y" size="5" value="<?php  print $y; ?>"/>

		<select>
         <option value="Calculate">Calculate</option>
         <option value="Clear">Clear</option>
		 <option value="Add">Add</option>
		 <option value="Subtract">Subtract</option>
		 <option value="Multiply">Multiply</option>
		 <option value="Divide">Divide</option>
		</select>
      </form>

      <!-- print the result -->
      <?php if(isset($calc)) { print "<p>x * y = $prod</p>"; }
			else if(isset($Add)) { print "<p>x + y = $prod</p>";}
			else if (isset($Subtract)) { print "<p>x - y = $prod</p>";}
			else if(isset($Multiply)) { print "<p>x * y = $prod</p>";}
			else if(isset($Divide)) { print "<p>x / y = $prod</p>";}
	  ?>

   </body>
</html>
	<?php

	/* ======================================================
	PHP Calculator example using "sticky" form (Version 1)
	======================================================

	Author : P Chatterjee (adopted from an original example written by C J Wallace)

	Purpose : To multiply 2 numbers passed from a HTML form and display the result.

	input:
	x, y : numbers
	calc : Calculate button pressed


	Date: 15 Oct 2007

	*/

	// grab the form values from $_HTTP_POST_VARS hash
	extract($_GET);

	// first compute the output, but only if data has been input
	if(isset($calc)) { // $calc exists as a variable
	$prod = $x * $y;
	}
	elseif(isset($Add)) {
	$prod = $x + $y;
	}

	elseif(isset($Subtract)) {
	$prod = $x - $y;
	}

	elseif(isset($Multiply)) {
	$prod = $x * $y;
	}

	elseif(isset($Divide)) {
	$prod = $x / $y;
	}

	else { // set defaults
	$x=0;
	$y=0;
	$prod=0;
	}
	?>

	<html>
	<head>
	<title>PHP Calculator Example</title>
	</head>

	<body>

	<h3>PHP Calculator (Version 1)</h3>
	<p>Multiply two numbers and output the result</p>

	<form method="get" action="<?php print $_SERVER['PHP_SELF']; ?>">

	x = <input type="text" name="x" size="5" value="<?php print $x; ?>"/>
	y = <input type="text" name="y" size="5" value="<?php print $y; ?>"/>

	<select>
	<option value="Calculate">Calculate</option>
	<option value="Clear">Clear</option>
	<option value="Add">Add</option>
	<option value="Subtract">Subtract</option>
	<option value="Multiply">Multiply</option>
	<option value="Divide">Divide</option>
	</select>
	</form>

	<!-- print the result -->
	<?php if(isset($calc)) { print "<p>x * y = $prod</p>"; }
	else if(isset($Add)) { print "<p>x + y = $prod</p>";}
	else if (isset($Subtract)) { print "<p>x - y = $prod</p>";}
	else if(isset($Multiply)) { print "<p>x * y = $prod</p>";}
	else if(isset($Divide)) { print "<p>x / y = $prod</p>";}
	?>

	</body>
	</html>