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<?php
class SimpleService
{
private $errors = array();
/**
* Highlights a string as php code
* @param string $input The php code to highlight
* @return string The highlighted text.
* @soapmethod
*/
public function highlight($input)
{
return highlight_string($input, true);
}
/**
* Given a left side, operation, and right side of an operation, will
* return the result of computing the equation.
* @param string $leftSide The left side of an equation
* @param string $operation The operation to perform
* @param string $rightSide The right side of the equation
* @return ComputationResult The result of the computation
* @soapmethod
*/
public function compute($leftSide, $operation, $rightSide)
{
$result = new ComputationResult();
$result->equation = "$leftSide $operation $rightSide";
$result->result = $this->evaluateExpression($leftSide, $operation, $rightSide);
if (count($this->errors)) {
$result->success = false;
$result->errors = $this->errors;
}
else {
$result->success = true;
}
return $result;
}
/**
* Simply add two operands
* @param int $a
* @param int $b
* @return int The result
* @soapmethod
*/
public function add($a, $b) {
return $a + $b;
}
/**
* This method evaluates the expression. It should be capable of handling any $op
* passed to it.
* @return string the result of the evaluation
*/
private function evaluateExpression($left, $op, $right)
{
// Now, because we don't want to eval random code on the server that this is running
// on, we're just going to highlight the string
$evaluation = highlight_string("$left $op $right;", true);
return $evaluation;
}
}
class ComputationResult
{
/**
* @var string The initial equation
*/
public $equation;
/**
* @var string The computed result
*/
public $result;
/**
* @var boolean Whether the computation succeeded
*/
public $success;
/**
* @var array any errors that occured in the processing.
*/
public $errors;
}
?>
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