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Gravity Wiz // Gravity Forms // Email Domain Validator // Ban/Limit Email Domains for Gravity Form Email Fields
<?php
/**
* Gravity Wiz // Gravity Forms // Email Domain Validator
*
* This snippets allows you to exclude a list of invalid domains or include a list of valid domains for your Gravity Form Email fields.
*
* @version 1.4
* @author David Smith <david@gravitywiz.com>
* @license GPL-2.0+
* @link http://gravitywiz.com/banlimit-email-domains-for-gravity-form-email-fields/
*/
class GW_Email_Domain_Validator {
private $_args;
function __construct($args) {
$this->_args = wp_parse_args( $args, array(
'form_id' => false,
'field_id' => false,
'domains' => false,
'validation_message' => __( 'Sorry, <strong>%s</strong> email accounts are not eligible for this form.' ),
'mode' => 'ban' // also accepts "limit"
) );
// convert field ID to an array for consistency, it can be passed as an array or a single ID
if($this->_args['field_id'] && !is_array($this->_args['field_id']))
$this->_args['field_id'] = array($this->_args['field_id']);
$form_filter = $this->_args['form_id'] ? "_{$this->_args['form_id']}" : '';
add_filter("gform_validation{$form_filter}", array($this, 'validate'));
}
function validate($validation_result) {
$form = $validation_result['form'];
foreach($form['fields'] as &$field) {
// if this is not an email field, skip
if(RGFormsModel::get_input_type($field) != 'email')
continue;
// if field ID was passed and current field is not in that array, skip
if($this->_args['field_id'] && !in_array($field['id'], $this->_args['field_id']))
continue;
$page_number = GFFormDisplay::get_source_page( $form['id'] );
if( $page_number > 0 && $field->pageNumber != $page_number ) {
continue;
}
if( GFFormsModel::is_field_hidden( $form, $field, array() ) ) {
continue;
}
$domain = $this->get_email_domain($field);
// if domain is valid OR if the email field is empty, skip
if($this->is_domain_valid($domain) || empty($domain))
continue;
$validation_result['is_valid'] = false;
$field['failed_validation'] = true;
$field['validation_message'] = sprintf($this->_args['validation_message'], $domain);
}
$validation_result['form'] = $form;
return $validation_result;
}
function get_email_domain( $field ) {
$email = explode( '@', rgpost( "input_{$field['id']}" ) );
return trim( rgar( $email, 1 ) );
}
function is_domain_valid( $domain ) {
$mode = $this->_args['mode'];
$domain = strtolower( $domain );
foreach( $this->_args['domains'] as $_domain ) {
$_domain = strtolower( $_domain );
$full_match = $domain == $_domain;
$suffix_match = strpos( $_domain, '.' ) === 0 && $this->str_ends_with( $domain, $_domain );
$has_match = $full_match || $suffix_match;
if( $mode == 'ban' && $has_match ) {
return false;
} else if( $mode == 'limit' && $has_match ) {
return true;
}
}
return $mode == 'limit' ? false : true;
}
function str_ends_with( $string, $text ) {
$length = strlen( $string );
$text_length = strlen( $text );
if( $text_length > $length ) {
return false;
}
return substr_compare( $string, $text, $length - $text_length, $text_length ) === 0;
}
}
class GWEmailDomainControl extends GW_Email_Domain_Validator { }
# Configuration
new GW_Email_Domain_Validator( array(
'form_id' => 326,
'field_id' => 1,
'domains' => array( 'gmail.com', 'hotmail.com', '.co.uk' ),
'validation_message' => __( 'Oh no! <strong>%s</strong> email accounts are not eligible for this form.' ),
'mode' => 'limit'
) );
@rinkul123

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commented May 1, 2015

gave me blank dead screen after putting these code to my function.php

152, 'field_id' => 9, 'domains' => array('gmail.com', 'hotmail.com', 'test.com') ));
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