fix #5

admin/index.php

@@ -1,4 +1,4 @@
-<?php
-/**
- * Silence is golden
- */
+<?php
+/**
+ * Silence is golden
+ */

composer.json

@@ -42,5 +42,11 @@
     "phpcs-errors-summary": "@check-cs-summary -n",
     "phpcbf": "phpcbf"
   },
-  "prefer-stable": true
+  "prefer-stable": true,
+  "config": {
+    "allow-plugins": {
+      "composer/installers": true,
+      "dealerdirect/phpcodesniffer-composer-installer": true
+    }
+  }
 }

includes/class-prevent-xss-vulnerability-frontend.php

@@ -257,6 +257,10 @@ public function prevent_reflected_xss() {
 			'prevent_xss_vulnerability_reflected_settings'
 		);
 
+		if ( ! $reflected_xss ) {
+			return;
+		}
+
 		if ( is_string( $reflected_xss ) ) {
 			$reflected_xss = maybe_unserialize( $reflected_xss );
 		}
@@ -304,11 +308,15 @@ public function escape_html() {
 			'prevent_xss_vulnerability_reflected_settings'
 		);
 
+		if ( ! $reflected_xss ) {
+			return;
+		}
+
 		if ( is_string( $reflected_xss ) ) {
 			$reflected_xss = maybe_unserialize( $reflected_xss );
 		}
 
-		if ( isset( $reflected_xss ) && isset( $reflected_xss['escape_html'] )
+		if ( isset( $reflected_xss, $reflected_xss['escape_html'] )
 			&& 1 === $reflected_xss['escape_html']
 		) {
 			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
@@ -339,11 +347,15 @@ public function escape_html() {
 	public function self_xss_script() {
 		$self_xss = get_option( 'prevent_xss_vulnerability_self_xss_settings' );
 
+		if ( ! $self_xss ) {
+			return;
+		}
+
 		if ( is_string( $self_xss ) ) {
 			$self_xss = maybe_unserialize( $self_xss );
 		}
 
-		if ( isset( $self_xss ) && isset( $self_xss['user_warning'] )
+		if ( isset( $self_xss, $self_xss['user_warning'] )
 			&& 1 === $self_xss['user_warning']
 		) {
 			$message = '';

includes/index.php

@@ -1,4 +1,4 @@
-<?php
-/**
- * Silence is golden
- */
+<?php
+/**
+ * Silence is golden
+ */

index.php

@@ -1,4 +1,4 @@
-<?php
-/**
- * Silence is golden
- */
+<?php
+/**
+ * Silence is golden
+ */