在Mac上安装pecl
curl -O http://pear.php.net/go-pear.phar
sudo php -d detect_unicode=0 go-pear.phar
输入1,回车,配置pear路径为:/usr/local/pear
输入4,回车,配置命令路径为:/usr/local/bin
sudo pecl config-show 查看配置
sudo pecl config-set ext_dir /usr/lib/php5/20131226
sudo pecl config-set php_dir /usr/share/php5
sudo pecl config-set php_bin /usr/bin/php5