diff --git a/system/CLI/CLI.php b/system/CLI/CLI.php
index 185f51e3635c..8aa9854900eb 100644
--- a/system/CLI/CLI.php
+++ b/system/CLI/CLI.php
@@ -348,7 +348,7 @@ public static function promptByMultipleKeys(string $text, array $options): array
             // return the prompt again if $input contain(s) non-numeric character, except a comma.
             // And if max from $options less than max from input,
             // it means user tried to access null value in $options
-            if (! $pattern || $maxOptions < $maxInput) {
+            if ($pattern === 0 || $pattern === false || $maxOptions < $maxInput) {
                 static::error('Please select correctly.');
                 CLI::newLine();
 
diff --git a/system/Database/MigrationRunner.php b/system/Database/MigrationRunner.php
index 4a39f13562e8..13919c785372 100644
--- a/system/Database/MigrationRunner.php
+++ b/system/Database/MigrationRunner.php
@@ -450,7 +450,7 @@ protected function migrationFromFile(string $path, string $namespace)
 
         $filename = basename($path, '.php');
 
-        if (! preg_match($this->regex, $filename)) {
+        if (preg_match($this->regex, $filename) !== 1) {
             return false;
         }
 
diff --git a/system/Helpers/form_helper.php b/system/Helpers/form_helper.php
index c3e2c83de0a6..7e11388841f4 100644
--- a/system/Helpers/form_helper.php
+++ b/system/Helpers/form_helper.php
@@ -62,7 +62,7 @@ function form_open(string $action = '', $attributes = [], array $hidden = []): s
         // Add CSRF field if enabled, but leave it out for GET requests and requests to external websites
         $before = service('filters')->getFilters()['before'];
 
-        if ((in_array('csrf', $before, true) || array_key_exists('csrf', $before)) && str_contains($action, base_url()) && ! stripos($form, 'method="get"')) {
+        if ((in_array('csrf', $before, true) || array_key_exists('csrf', $before)) && str_contains($action, base_url()) && stripos($form, 'method="get"') === false) {
             $form .= csrf_field($csrfId ?? null);
         }
 
diff --git a/system/Router/RouteCollection.php b/system/Router/RouteCollection.php
index 2dbaba05e4cd..13cbba449989 100644
--- a/system/Router/RouteCollection.php
+++ b/system/Router/RouteCollection.php
@@ -1329,7 +1329,7 @@ protected function fillRouteParams(string $from, ?array $params = null): string
         $patterns = $matches[0];
 
         foreach ($patterns as $index => $pattern) {
-            if (! preg_match('#^' . $pattern . '$#u', $params[$index])) {
+            if (preg_match('#^' . $pattern . '$#u', $params[$index]) !== 1) {
                 throw RouterException::forInvalidParameterType();
             }
 
@@ -1391,7 +1391,7 @@ protected function buildReverseRoute(string $from, array $params): string
             // or maybe $placeholder is not a placeholder, but a regex.
             $pattern = $this->placeholders[$placeholderName] ?? $placeholder;
 
-            if (! preg_match('#^' . $pattern . '$#u', (string) $params[$index])) {
+            if (preg_match('#^' . $pattern . '$#u', (string) $params[$index]) !== 1) {
                 throw RouterException::forInvalidParameterType();
             }