1. sudo pecl install xlswriter

    可能会报如下错误:
    WARNING: channel “pecl.php.net” has updated its protocols, use “pecl channel-update pecl.php.net” to updateCannot install, php_dir for channel “pecl.php.net” is not writeable by the current user

    解决方案:

     sudo pecl channel-update pecl.php.net

    再执行安装可能还会提示如下错误:

    Cannot install, php_dir for channel “pecl.php.net” is not writeable by the current user

    由于 php_dir 权限问题导致，找出这个目录

    pecl config-get php_dir

    /usr/share/php

    给目录赋予权限:

    sudo chown -R john /usr/share/php

    再次执行安装:

    sudo pecl install xlswriter