Using acf/validate_value on front-end form

• Julien

• June 10, 2018 at 9:23 pm

Hello,
I made a front-end form with ACF, and I needed to add a field manually, but I can’t figure out how to validate this field, my page code is:

<form action="<?php the_permalink(); ?>" method="post" accept-charset="UTF-8">
	
	<label for="message">message</label>
	<input type="text" name="message" value="<?php echo esc_attr($_POST['message']); ?>">
	
	<?php acf_form(array(
		'form' => false
	)); ?>
	
	<input type="submit" name="submitted" value="Send">

</form>

and my function.php:

add_filter('acf/validate_value/name=message', 'my_acf_validate_value', 9, 4);
function my_acf_validate_value( $valid, $value, $field, $input ){
	if( !$valid ) {
		return $valid;
	}
	if ( empty($_POST['message']) ) {
		$valid = 'error';
	}
	return $valid;
}
add_action('acf/save_post', 'my_save_post');
function my_save_post() {
	if( is_admin() ) {
		return;
	}
	// get custom fields (field group exists for content_form)
	$name = get_field('name');
	$email = get_field('email');
	// email data
	$to = '[email protected]';
	$headers = 'From: ' . $name . ' <' . $email . '>' . "\r\n";
	$subject = 'Form';
	$message = $_POST['message'];
	// send email
	wp_mail($to, $subject, $message, $headers );
}

I guess it’s because this validation works only for the ACF fields ? But there is maybe a way to make it works, if you have any idea, would appreciate it a lot!
Thanks