PHP的SSH2扩展的安装
PHP的SSH2扩展的安装（基于linux(centos)）要在php里面用到ssh
首先要确保系统已经安装好了（LNMP或者LAMP，具体的安装方式见地址
系统环境 centos 5.6x64
# uname -a
Linux localhost 2.6.18-238.el5 #1 SMP Thu Jan 13 15:51:15 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
前提环境：yum install php
1.安装OpenSSL
# yum install openssl
# yum install openssl-devel
2. 编译安装libssh2
wget http://www.libssh2.org/download/libssh2-1.2.9.tar.gz
tar zxvf libssh2-1.2.9.tar.gz
cd libssh2-1.2.9
./configure&&make&&make install
3. 编译安装ssh2(官网http://www.php.net/ssh2)
wget http://pecl.php.net/get/ssh2-0.11.2.tgz
tar zxvf ssh2-0.11.2.tgz
cd ssh2-0.11.2
phpize（如果没有找到该命令，请确定是否安装的是php-dev）
./configure --with-ssh2
make
cp modules/ssh2.so /usr/lib64/php/modules/
echo "extension=ssh2.so" >> /etc/php.ini
4. 重启httpd
service httpd restart
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