1.20.x form.inc | form_validate_number(&$element, &$form_state) |
Form element validation handler for #type 'number'.
Note that #required is validated by _form_validate() already.
Related topics
File
- includes/
form.inc, line 4567 - Functions for form and batch generation and processing.
Code
function form_validate_number(&$element, &$form_state) {
$value = $element['#value'];
if ($value === '') {
return;
}
$name = empty($element['#title']) ? $element['#parents'][0] : $element['#title'];
// Ensure the input is numeric.
if (!is_numeric($value)) {
form_error($element, t('%name must be a number.', array('%name' => $name)));
return;
}
// Ensure that the input is greater than the #min property, if set.
if (isset($element['#min']) && $value < $element['#min']) {
form_error($element, t('%name must be higher or equal to %min.', array('%name' => $name, '%min' => $element['#min'])));
}
// Ensure that the input is less than the #max property, if set.
if (isset($element['#max']) && $value > $element['#max']) {
form_error($element, t('%name must be below or equal to %max.', array('%name' => $name, '%max' => $element['#max'])));
}
if (isset($element['#step']) && strtolower($element['#step']) != 'any') {
// Check that the input is an allowed multiple of #step (offset by #min if
// #min is set).
$offset = isset($element['#min']) ? $element['#min'] : 0.0;
if (!valid_number_step($value, $element['#step'], $offset)) {
form_error($element, t('%name is not a valid number.', array('%name' => $name)));
}
}
}