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- <?php
- // Create token header as a JSON string
- $header = json_encode(['typ' => 'JWT', 'alg' => 'HS256']);
- // Create token payload as a JSON string
- $payload = json_encode(['user_id' => 123]);
- // Encode Header to Base64Url String
- $base64UrlHeader = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($header));
- // Encode Payload to Base64Url String
- $base64UrlPayload = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($payload));
- // Create Signature Hash
- $signature = hash_hmac('sha256', $base64UrlHeader . "." . $base64UrlPayload, 'abC123!', true);
- // Encode Signature to Base64Url String
- $base64UrlSignature = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($signature));
- // Create JWT
- $jwt = $base64UrlHeader . "." . $base64UrlPayload . "." . $base64UrlSignature;
- echo $jwt;
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