Validate Phone Numbers in Fluent Forms
Checks Fluent Forms phone fields for a realistic number of digits and only the characters phone numbers use, instead of accepting any text.
Opens WPIDE on
Code
$wpide_ff_phone_fields = array( 'phone' );
$wpide_ff_phone_min = 7;
$wpide_ff_phone_max = 15;
add_filter( 'fluentform/validation_errors', function ( $errors, $data ) use ( $wpide_ff_phone_fields, $wpide_ff_phone_min, $wpide_ff_phone_max ) {
foreach ( $wpide_ff_phone_fields as $name ) {
$phone = isset( $data[ $name ] ) && is_string( $data[ $name ] ) ? trim( $data[ $name ] ) : '';
if ( '' === $phone ) {
continue;
}
$digits = strlen( preg_replace( '/\D/', '', $phone ) );
if ( ! preg_match( '/^\+?[0-9\s().\-]+$/', $phone ) || $digits < $wpide_ff_phone_min || $digits > $wpide_ff_phone_max ) {
$errors[ $name ] = array( 'Please enter a valid phone number.' );
}
}
return $errors;
}, 10, 2 );Notes
Set the phone field names at the top; empty optional fields are skipped.
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