diff --git a/src/Ctype/Ctype.php b/src/Ctype/Ctype.php
index ba75a2c95..b19c2f151 100644
--- a/src/Ctype/Ctype.php
+++ b/src/Ctype/Ctype.php
@@ -31,7 +31,8 @@ final class Ctype
      */
     public static function ctype_alnum($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^A-Za-z0-9]/', $text);
     }
@@ -47,7 +48,8 @@ public static function ctype_alnum($text)
      */
     public static function ctype_alpha($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^A-Za-z]/', $text);
     }
@@ -63,7 +65,8 @@ public static function ctype_alpha($text)
      */
     public static function ctype_cntrl($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^\x00-\x1f\x7f]/', $text);
     }
@@ -79,7 +82,8 @@ public static function ctype_cntrl($text)
      */
     public static function ctype_digit($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^0-9]/', $text);
     }
@@ -95,7 +99,8 @@ public static function ctype_digit($text)
      */
     public static function ctype_graph($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^!-~]/', $text);
     }
@@ -111,7 +116,8 @@ public static function ctype_graph($text)
      */
     public static function ctype_lower($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^a-z]/', $text);
     }
@@ -127,7 +133,8 @@ public static function ctype_lower($text)
      */
     public static function ctype_print($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^ -~]/', $text);
     }
@@ -143,7 +150,8 @@ public static function ctype_print($text)
      */
     public static function ctype_punct($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^!-\/\:-@\[-`\{-~]/', $text);
     }
@@ -159,7 +167,8 @@ public static function ctype_punct($text)
      */
     public static function ctype_space($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^\s]/', $text);
     }
@@ -175,7 +184,8 @@ public static function ctype_space($text)
      */
     public static function ctype_upper($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^A-Z]/', $text);
     }
@@ -191,7 +201,8 @@ public static function ctype_upper($text)
      */
     public static function ctype_xdigit($text)
     {
-        $text = self::convert_int_to_char_for_ctype($text, __FUNCTION__);
+        self::checkType($text, __FUNCTION__);
+        $text = self::convert_int_to_char_for_ctype($text);
 
         return \is_string($text) && '' !== $text && !preg_match('/[^A-Fa-f0-9]/', $text);
     }
@@ -205,11 +216,10 @@ public static function ctype_xdigit($text)
      * Any other integer is interpreted as a string containing the decimal digits of the integer.
      *
      * @param mixed  $int
-     * @param string $function
      *
      * @return mixed
      */
-    private static function convert_int_to_char_for_ctype($int, $function)
+    private static function convert_int_to_char_for_ctype($int)
     {
         if (!\is_int($int)) {
             return $int;
@@ -219,14 +229,20 @@ private static function convert_int_to_char_for_ctype($int, $function)
             return (string) $int;
         }
 
-        if (\PHP_VERSION_ID >= 80100) {
-            @trigger_error($function.'(): Argument of type int will be interpreted as string in the future', \E_USER_DEPRECATED);
-        }
-
         if ($int < 0) {
             $int += 256;
         }
 
         return \chr($int);
     }
+
+    /**
+     * @param mixed $input
+     */
+    private static function checkType($input, string $function): void
+    {
+        if (\PHP_VERSION_ID >= 80100 && !\is_string($input)) {
+            @trigger_error($function.'(): Argument of type '.get_debug_type($input).' will be interpreted as string in the future', \E_USER_DEPRECATED);
+        }
+    }
 }
diff --git a/src/Ctype/composer.json b/src/Ctype/composer.json
index 131ca7adb..99d74b24e 100644
--- a/src/Ctype/composer.json
+++ b/src/Ctype/composer.json
@@ -16,7 +16,8 @@
         }
     ],
     "require": {
-        "php": ">=7.2"
+        "php": ">=7.2",
+        "symfony/polyfill-php80": "^1.31"
     },
     "provide": {
         "ext-ctype": "*"