Gravity Form Function Validation WordPress

Bob answers:


public function valida_rut($rut)
{
if (!preg_match("/^[0-9.]+[-]?+[0-9kK]{1}/", $rut)) {
return false;
}
$rut = preg_replace('/[\.\-]/i', '', $rut);
$dv = substr($rut, -1);
$numero = substr($rut, 0, strlen($rut) - 1);
$i = 2;
$suma = 0;
foreach (array_reverse(str_split($numero)) as $v) {
if ($i == 8)
$i = 2;
$suma += $v * $i;
++$i;
}
$dvr = 11 - ($suma % 11);
if ($dvr == 11)
$dvr = 0;
if ($dvr == 10)
$dvr = 'K';
if ($dvr == strtoupper($dv))
return true;
else
return false;
}
add_filter( 'gform_validation_1', 'custom_validation' );
function custom_validation( $validation_result ) {
$form = $validation_result['form'];

//validate input 1 with desired function valida_rut
if ( valida_rut( rgpost( 'input_1' ) ) == false ) {

// set the form validation to false
$validation_result['is_valid'] = false;

//finding Field with ID of 1 and marking it as failed validation
foreach( $form['fields'] as &$field ) {

//NOTE: replace 1 with the field you would like to validate
if ( $field->id == '1' ) {
$field->failed_validation = true;
$field->validation_message = 'This field is invalid!';
break;
}
}

}

//Assign modified $form object back to the validation result
$validation_result['form'] = $form;
return $validation_result;

}


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