update

wp-content/plugins/contact-form-7/includes/swv/php/rules/requiredfile.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Contactable\SWV;
+
+class RequiredFileRule extends Rule {
+
+	const rule_name = 'requiredfile';
+
+	public function matches( $context ) {
+		if ( false === parent::matches( $context ) ) {
+			return false;
+		}
+
+		if ( empty( $context['file'] ) ) {
+			return false;
+		}
+
+		return true;
+	}
+
+	public function validate( $context ) {
+		$field = $this->get_property( 'field' );
+		$input = $_FILES[$field]['tmp_name'] ?? '';
+		$input = wpcf7_array_flatten( $input );
+		$input = wpcf7_exclude_blank( $input );
+
+		if ( empty( $input ) ) {
+			return $this->create_error();
+		}
+
+		return true;
+	}
+
+}