PHP 7 升级

在升级到 PHP 7 之后，网站访问速度果然提升了不少

不过在安装 PHP 的一些依赖的时候也出现了一些问题

比如在接下来要提到的依赖 php7.0-mbstring

遇到的问题

当我执行安装命令时出现了如下错误:

root@iZu1w7e9kaaZ:~# apt-get install php7.0-mbstring
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  php7.0-mbstring
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 462 kB of archives.
After this operation, 1542 kB of additional disk space will be used.
Err http://ppa.launchpad.net/ondrej/php/ubuntu/ trusty/main php7.0-mbstring amd64 7.0.14-1+deb.sury.org~trusty+1
  404  Not Found
E: Failed to fetch http://ppa.launchpad.net/ondrej/php/ubuntu/pool/main/p/php7.0/php7.0-mbstring_7.0.14-1+deb.sury.org~trusty+1_amd64.deb  404  Not Found

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

根据错误提示 404 Not Found 可以发现，这个应该是安装源的问题

解决问题

尝试重新安装一下 PHP 7 的安装源

首先是将现有的安装源移除:

sudo apt-get install python-software-properties

sudo ppa-purge ppa:ondrej/php-7.0

如果提示 ppa-purge command no found

可以使用以下命令将安装源移除:

rm /etc/apt/sources.list.d/ondrej*

然后就是再次安装 PHP 7 源:

LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/php

注意，我在这行命令前加了 LC_ALL=en_US.UTF-8

这是因为在解决这个问题的时候，引申出了另一个问题

当我在执行 add-apt-repository ppa:ondrej/php 时，遇到了以下错误:

gpg: keyring `/tmp/tmpms3yty2b/secring.gpg' created
gpg: keyring `/tmp/tmpms3yty2b/pubring.gpg' created
gpg: requesting key E5267A6C from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpms3yty2b/trustdb.gpg: trustdb created
gpg: key E5267A6C: public key "Launchpad PPA for Ond\xc5\x99ej Sur�" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 687, in addkey_func
    func(**kwargs)
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 370, in add_key
    return apsk.add_ppa_signing_key()
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 261, in add_ppa_signing_key
    tmp_export_keyring, signing_key_fingerprint, tmp_keyring_dir):
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 210, in _verify_fingerprint
    got_fingerprints = self._get_fingerprints(keyring, keyring_dir)
  File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 202, in _get_fingerprints
    output = subprocess.check_output(cmd, universal_newlines=True)
  File "/usr/lib/python3.4/subprocess.py", line 609, in check_output
    output, unused_err = process.communicate(inputdata, timeout=timeout)
  File "/usr/lib/python3.4/subprocess.py", line 947, in communicate
    stdout = _eintr_retry_call(self.stdout.read)
  File "/usr/lib/python3.4/subprocess.py", line 491, in _eintr_retry_call
    return func(*args)
  File "/usr/lib/python3.4/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 92: ordinal not in range(128)

这个是 Locale 的设置问题，所以需求增加 LC_ALL=en_US.UTF-8 命令

最后就可以放心的从安装源更新依赖了

sudo apt-get update

sudo apt-get install php7.0-mbstring

参考链接

http://serverfault.com/questions/666754/unicodedecodeerror-in-ubuntu-while-installing-php5-6-from-ppa#answer-728001

http://askubuntu.com/questions/741913/php7-0-dev-installation-fails-on-ubuntu-14-0-4