mac安装PHP70链接问题帮忙解决下

zhangboxundeMacBook-Pro:~zhangboxun$php-v
PHP5.6.25(cli)(built:Sep19201615:45:41)
Copyright(c)1997-2016ThePHPGroup
ZendEnginev2.6.0,Copyright(c)1998-2016ZendTechnologies
zhangboxundeMacBook-Pro:~zhangboxun$brewinstallphp70
Warning:homebrew/php/php70-7.0.12_5alreadyinstalled,it'sjustnotlinked
zhangboxundeMacBook-Pro:~zhangboxun$brewlinkphp70
Linking/usr/local/Cellar/php70/7.0.12_5...
Error:Couldnotsymlinkbin/phar
Target/usr/local/bin/phar
alreadyexists.Youmaywanttoremoveit:
rm'/usr/local/bin/phar'

Toforcethelinkandoverwriteallconflictingfiles:
brewlink--overwritephp70

Tolistallfilesthatwouldbedeleted:
brewlink--overwrite--dry-runphp70