openssl unable to get local issuer certificate

回答: 当openssl出现"unable to get local issuer certificate"的错误时，通常是由于缺少本地颁发机构（CA）证书导致的。这个错误表示openssl无法验证服务器证书的颁发机构。一个解决方法是手动安装缺少的CA证书。你可以参考中提到的Composer的问题，它也是由于缺少CA证书导致的。另外，你也可以通过比较线上环境的openssl版本与本地服务器的openssl版本来找出问题所在，如所提到的。确保两个环境的openssl版本一致并且都包含了必要的CA证书。如果需要，你可以从可信任的证书提供商处获取并安装缺少的CA证书。<em>1</em><em>2</em><em>3</em>
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