Question

我需要验证重力形式的电子邮件字段。我们有一些已知的电子邮件域列表，需要验证该域是否存在以及是否存在该域意味着我们需要显示错误消息。

实现此目标的最佳方法是什么？有插件建议吗？

Answer 1

这可以通过GW_Email_Domain_Validator片段在此处进行：

https://gravitywiz.com/banlimit-email-domains-for-gravity-form-email-fields/

此处包含截至2020年7月18日的完整摘要。使用上面的链接获取最新版本。

<?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;
    }

}

要仅接受来自给定电子邮件域的提交，可以执行以下操作：

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'
) );

如何通过阻止Wordpress中的某些电子邮件域名来进行电子邮件验证？

1 个答案: