Replace mbstring functions with equivalent standard PHP string functions

Multibyte PHP functions are replaced with equivalent standard string functions to improve program efficiency. The mbstring extension dependency from the composer.json files has also been removed as it's no longer needed. This change should have no impact on functionality as the string operations being performed do not require multi-byte safe functions.

ecs.php

@@ -2,7 +2,6 @@
 
 declare(strict_types=1);
 
-use PhpCsFixer\Fixer\Alias\MbStrFunctionsFixer;
 use PhpCsFixer\Fixer\ArrayNotation\ArraySyntaxFixer;
 use PhpCsFixer\Fixer\ClassNotation\ProtectedToPrivateFixer;
 use PhpCsFixer\Fixer\Comment\HeaderCommentFixer;
@@ -53,7 +52,6 @@
     $config->rule(ProtectedToPrivateFixer::class);
     $config->rule(DeclareStrictTypesFixer::class);
     $config->rule(NativeConstantInvocationFixer::class);
-    $config->rule(MbStrFunctionsFixer::class);
     $config->rule(LinebreakAfterOpeningTagFixer::class);
     $config->rule(CombineConsecutiveIssetsFixer::class);
     $config->rule(CombineConsecutiveUnsetsFixer::class);

src/metadata-service/src/CertificateChain/CertificateToolbox.php

@@ -6,8 +6,7 @@
 
 use const PHP_EOL;
 
-final readonly class
-CertificateToolbox
+final readonly class CertificateToolbox
 {
     private const string PEM_HEADER = '-----BEGIN ';
 

src/webauthn/src/CeremonyStep/CheckCredentialId.php

@@ -10,6 +10,7 @@
 use Webauthn\PublicKeyCredentialCreationOptions;
 use Webauthn\PublicKeyCredentialRequestOptions;
 use Webauthn\PublicKeyCredentialSource;
+use function strlen;
 
 class CheckCredentialId implements CeremonyStep
 {

src/webauthn/src/CeremonyStep/CheckOrigin.php

@@ -14,6 +14,7 @@
 use function in_array;
 use function is_array;
 use function is_string;
+use function strlen;
 
 final readonly class CheckOrigin implements CeremonyStep
 {

src/webauthn/src/PublicKeyCredentialUserEntity.php

@@ -5,6 +5,7 @@
 namespace Webauthn;
 
 use Webauthn\Exception\InvalidDataException;
+use function strlen;
 
 class PublicKeyCredentialUserEntity extends PublicKeyCredentialEntity
 {

src/webauthn/src/StringStream.php

@@ -12,6 +12,7 @@
 use function fread;
 use function fwrite;
 use function rewind;
+use function strlen;
 
 final class StringStream implements Stream
 {

src/webauthn/src/U2FPublicKey.php

@@ -11,6 +11,7 @@
 use CBOR\UnsignedIntegerObject;
 use Cose\Algorithms;
 use Cose\Key\Ec2Key;
+use function strlen;
 
 /**
  * @internal

src/webauthn/src/Util/CoseSignatureFixer.php

@@ -10,6 +10,7 @@
 use Cose\Algorithm\Signature\ECDSA\ES384;
 use Cose\Algorithm\Signature\ECDSA\ES512;
 use Cose\Algorithm\Signature\Signature;
+use function strlen;
 
 /**
  * This class fixes the signature of the ECDSA based algorithms.

tests/symfony/functional/Attestation/AttestationTest.php

@@ -21,6 +21,7 @@
 use Webauthn\Tests\MockedRequestTrait;
 use Webauthn\TrustPath\CertificateTrustPath;
 use Webauthn\TrustPath\EmptyTrustPath;
+use function strlen;
 
 /**
  * @internal