Randomize field.

inc/helpers/namespace.php

@@ -9,6 +9,7 @@ namespace Aldine\Helpers;
 
 use function \Pressbooks\Metadata\book_information_to_schema;
 use function \Pressbooks\Metadata\is_bisac;
+use function \Pressbooks\Utility\str_starts_with;
 use Pressbooks\Book;
 
 /**
@@ -260,8 +261,10 @@ function handle_contact_form_submission() {
 	}
 	if ( isset( $_POST['submitted'] ) ) {
 		// Check the fake anti-spam honeypot field.
-		if ( ! empty( $_POST['firstname'] ) ) {
-			return false; // Honeypot failed.
+		foreach ( $_POST as $pkey => $pval ) {
+			if ( str_starts_with( $pkey, 'firstname' ) && ! empty( $pval ) ) {
+				return false; // Honeypot failed.
+			}
 		}
 		$contact_email = get_option( 'pb_network_contact_email', get_option( 'admin_email' ) );
 		$output = [];

partials/contact-form.php

@@ -11,6 +11,7 @@
 $pb_network_contact_form_title = get_option( 'pb_network_contact_form_title' );
 $contact_form_title = ( ! empty( $pb_network_contact_form_title ) ) ? $pb_network_contact_form_title : __( 'Contact Us', 'pressbooks-aldine' );
 $contact_form_response = \Aldine\Helpers\handle_contact_form_submission();
+$honeypot = 'firstname' . rand();
 
 ?>
 
@@ -23,8 +24,8 @@ $contact_form_response = \Aldine\Helpers\handle_contact_form_submission();
 		<?php wp_nonce_field( 'pb_root_contact_form', 'pb_root_contact_form_nonce' ); ?>
 		<input type="hidden" name="submitted" value="1">
 		<p class="form__row" style="display:none;">
-			<input type="text" name="firstname" id="firstname"/>
-			<label for="firstname">
+			<input type="text" name="<?php echo $honeypot; ?>" id="<?php echo $honeypot; ?>"/>
+			<label for="<?php echo $honeypot; ?>">
 				<?php _e( 'Keep this field blank (required)', 'pressbooks-aldine' ); ?>
 			</label>
 		</p>