function _mathfield_evaluate_element in Math Field 7

Helper to evaluate a single mathfield element.

Parameters

array $element: The mathfield element definition.

array $form_state: The current form state including submitted values.

1 call to _mathfield_evaluate_element()

mathfield_widget_validate in ./mathfield.module

Validate callback to evaluate the math expression.

File

./mathfield.module, line 368

Adds a dynamic math expression field.

Code

function _mathfield_evaluate_element($element, &$form_state) {
  $expression = $element['#settings']['expression'];
  $replacements = mathfield_get_token_values($element, $form_state);
  $value = mathfield_evaluate($expression, $element['#settings'], $replacements);
  if ($value !== FALSE) {
    mathfield_form_set_value($element, $value, $form_state);
  }
  else {

    // Could not evaluate the field.
    mathfield_form_set_value($element, '', $form_state);
  }
}