pecl install swoole报错：WARNING: channel "pecl.php.net" has updated its protocols, use "pecl channel-update pecl.php.net" to update
pecl 安装swoole扩展报错
执行
pecl channel-update pecl.php.net
接着报错
ERROR: unable to unpack /tmp/pear/download/swoole-4.4.13.tgz
是因为/tmp/pear/download/目录没有权限
chmod 777 -R /tmp/pear/download
