diff --git a/Php83.php b/Php83.php
index 8b7ee4c..03409fb 100644
--- a/Php83.php
+++ b/Php83.php
@@ -32,7 +32,7 @@ public static function json_validate(string $json, int $depth = 512, int $flags
         }
 
         if ($depth > self::JSON_MAX_DEPTH) {
-            throw new \ValueError(sprintf('json_validate(): Argument #2 ($depth) must be less than %d', self::JSON_MAX_DEPTH));
+            throw new \ValueError(\sprintf('json_validate(): Argument #2 ($depth) must be less than %d', self::JSON_MAX_DEPTH));
         }
 
         json_decode($json, true, $depth, $flags);
@@ -40,7 +40,8 @@ public static function json_validate(string $json, int $depth = 512, int $flags
         return \JSON_ERROR_NONE === json_last_error();
     }
 
-    public static function mb_str_pad(string $string, int $length, string $pad_string = ' ', int $pad_type = \STR_PAD_RIGHT, ?string $encoding = null): string
+    /** @return string|false */
+    public static function mb_str_pad(string $string, int $length, string $pad_string = ' ', int $pad_type = \STR_PAD_RIGHT, ?string $encoding = null)
     {
         if (!\in_array($pad_type, [\STR_PAD_RIGHT, \STR_PAD_LEFT, \STR_PAD_BOTH], true)) {
             throw new \ValueError('mb_str_pad(): Argument #4 ($pad_type) must be STR_PAD_LEFT, STR_PAD_RIGHT, or STR_PAD_BOTH');
@@ -50,19 +51,27 @@ public static function mb_str_pad(string $string, int $length, string $pad_strin
             $encoding = mb_internal_encoding();
         }
 
+        $errorToTrigger = null;
         try {
-            $validEncoding = @mb_check_encoding('', $encoding);
+            if (!@mb_check_encoding('', $encoding)) {
+                $errorToTrigger = \sprintf('mb_str_pad(): Argument #5 ($encoding) must be a valid encoding, "%s" given', $encoding);
+            }
         } catch (\ValueError $e) {
-            throw new \ValueError(sprintf('mb_str_pad(): Argument #5 ($encoding) must be a valid encoding, "%s" given', $encoding));
+            $errorToTrigger = \sprintf('mb_str_pad(): Argument #5 ($encoding) must be a valid encoding, "%s" given', $encoding);
         }
 
-        // BC for PHP 7.3 and lower
-        if (!$validEncoding) {
-            throw new \ValueError(sprintf('mb_str_pad(): Argument #5 ($encoding) must be a valid encoding, "%s" given', $encoding));
+        if (mb_strlen($pad_string, $encoding) <= 0) {
+            $errorToTrigger = 'mb_str_pad(): Argument #3 ($pad_string) must be a non-empty string';
         }
 
-        if (mb_strlen($pad_string, $encoding) <= 0) {
-            throw new \ValueError('mb_str_pad(): Argument #3 ($pad_string) must be a non-empty string');
+        if (null !== $errorToTrigger) {
+            if (80000 > \PHP_VERSION_ID) {
+                trigger_error($errorToTrigger, \E_USER_WARNING);
+
+                return false;
+            }
+
+            throw new \ValueError($errorToTrigger);
         }
 
         $paddingRequired = $length - mb_strlen($string, $encoding);
@@ -135,7 +144,7 @@ public static function str_decrement(string $string): string
         }
 
         if (preg_match('/\A(?:0[aA0]?|[aA])\z/', $string)) {
-            throw new \ValueError(sprintf('str_decrement(): Argument #1 ($string) "%s" is out of decrement range', $string));
+            throw new \ValueError(\sprintf('str_decrement(): Argument #1 ($string) "%s" is out of decrement range', $string));
         }
 
         if (!\in_array(substr($string, -1), ['A', 'a', '0'], true)) {
diff --git a/bootstrap.php b/bootstrap.php
index a92799c..8d721a2 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -19,12 +19,6 @@
     function json_validate(string $json, int $depth = 512, int $flags = 0): bool { return p\Php83::json_validate($json, $depth, $flags); }
 }
 
-if (extension_loaded('mbstring')) {
-    if (!function_exists('mb_str_pad')) {
-        function mb_str_pad(string $string, int $length, string $pad_string = ' ', int $pad_type = STR_PAD_RIGHT, ?string $encoding = null): string { return p\Php83::mb_str_pad($string, $length, $pad_string, $pad_type, $encoding); }
-    }
-}
-
 if (!function_exists('stream_context_set_options')) {
     function stream_context_set_options($context, array $options): bool { return stream_context_set_option($context, $options); }
 }
@@ -37,8 +31,14 @@ function str_increment(string $string): string { return p\Php83::str_increment($
     function str_decrement(string $string): string { return p\Php83::str_decrement($string); }
 }
 
-if (\PHP_VERSION_ID >= 80100) {
-    return require __DIR__.'/bootstrap81.php';
+if (\PHP_VERSION_ID >= 80000) {
+    return require __DIR__.'/bootstrap80.php';
+}
+
+if (extension_loaded('mbstring')) {
+    if (!function_exists('mb_str_pad')) {
+        function mb_str_pad(string $string, int $length, string $pad_string = ' ', int $pad_type = STR_PAD_RIGHT, ?string $encoding = null) { return p\Php83::mb_str_pad($string, $length, $pad_string, $pad_type, $encoding); }
+    }
 }
 
 if (!function_exists('ldap_exop_sync') && function_exists('ldap_exop')) {
diff --git a/bootstrap80.php b/bootstrap80.php
new file mode 100644
index 0000000..9b812d0
--- /dev/null
+++ b/bootstrap80.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Symfony\Polyfill\Php83 as p;
+
+if (extension_loaded('mbstring')) {
+    if (!function_exists('mb_str_pad')) {
+        function mb_str_pad(string $string, int $length, string $pad_string = ' ', int $pad_type = STR_PAD_RIGHT, ?string $encoding = null): string { return p\Php83::mb_str_pad($string, $length, $pad_string, $pad_type, $encoding); }
+    }
+}
+
+if (\PHP_VERSION_ID >= 80100) {
+    return require __DIR__.'/bootstrap81.php';
+}
+
+if (!function_exists('ldap_exop_sync') && function_exists('ldap_exop')) {
+    function ldap_exop_sync($ldap, string $request_oid, ?string $request_data = null, ?array $controls = null, &$response_data = null, &$response_oid = null): bool { return ldap_exop($ldap, $request_oid, $request_data, $controls, $response_data, $response_oid); }
+}
+
+if (!function_exists('ldap_connect_wallet') && function_exists('ldap_connect')) {
+    function ldap_connect_wallet(?string $uri, string $wallet, string $password, int $auth_mode = \GSLC_SSL_NO_AUTH) { return ldap_connect($uri, $wallet, $password, $auth_mode); }
+}