感谢您阅读我的问题。我正在尝试从 PHP（安装在 Amazon EC2 上）发送推送通知，代码在 localhost 上工作，但是当移动到 EC2 时，它给出了错误：
PHP Warning: stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure in ... on line 24, referer: ...
PHP Warning: stream_socket_client(): Failed to enable crypto in ... on line 24, referer: ...
PHP Warning: stream_socket_client(): unable to connect to ssl://gateway.sandbox.push.apple.com:2195 (Unknown error) in ... on line 24, referer: ...
pem 文件的路径是正确的（我尝试了绝对路径）。感谢帮助！