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需求

The » OpenSSL and » libssh2 libraries are required. Ensure that the development libraries are installed, where a typical package name might be openssl-dev.

Version 1.2 or newer of the libssh2 library is required, although it's possible newer releases of pecl/ssh2 may require newer versions (see the release notes).

The ssh2_auth_agent() function will only be available with libssh >= 1.2.3.

support for stream_set_timeout() to channel streams will only be available with libssh >= 1.2.9.

Libssh2 comes in two flavours: gcrypt or openssl. Some Linux distributions build libssh2 with the gcrypt library, some use openssl. Libssh2 has some issues when compiled with gcrypt, please use openssl.