Gravity Form Email Validation by Domain

Scenario:

Needed to allow ONLY email addresses from a specific client domain to be entered into a Gravity Form.

NOTES: Form ID = 2, Field ID = 9
Used strtoupper to allow domain.com as well as DOMAIN.COM.

Here’s the validation script:


add_filter( 'gform_field_validation_2_9', 'custom_validation', 10, 4 );
function custom_validation( $result, $value, $form, $field ) {

if ( $result['is_valid'] && !str_contains(strtoupper($value), '@DOMAIN.COM') ) {
$result['is_valid'] = false;
$result['message'] = 'Please enter a valid DOMAIN.COM email address';
}
return $result;
}

Gravity Form Email Validation by Domain

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