回答編集履歴
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修正
    
        answer	
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         @@ -1,3 +1,3 @@ 
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       1 
1 
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            ```php
         
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       2 
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            $signedData = hash_hmac('sha256',  'KEY\n'.time(), 'SECRET',  
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            $signedData = hash_hmac('sha256',  'KEY\n'.time(), 'SECRET', false);
         
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       3 
3 
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            ```
         
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