启用 php ext-xml？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/47759036/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Enabling php ext-xml?
提问by user3425506
While trying to use Composer to create a Symfony 4 project I got the following error:
在尝试使用 Composer 创建 Symfony 4 项目时，我收到以下错误：
steve@laptop ~ $ php composer.phar create-project symfony/skeleton my-proj
Installing symfony/skeleton (v4.0.0)
- Installing symfony/skeleton (v4.0.0): Loading from cache
Created project in my-proj
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- symfony/framework-bundle v4.0.1 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- symfony/framework-bundle v4.0.0 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- Installation request for symfony/framework-bundle ^4.0 -> satisfiable by symfony/framework-bundle[v4.0.0, v4.0.1].
To enable extensions, verify that they are enabled in your .ini files:
- /etc/php/7.2/cli/php.ini
- /etc/php/7.2/cli/conf.d/10-opcache.ini
- /etc/php/7.2/cli/conf.d/10-pdo.ini
- /etc/php/7.2/cli/conf.d/20-calendar.ini
- /etc/php/7.2/cli/conf.d/20-ctype.ini
- /etc/php/7.2/cli/conf.d/20-exif.ini
- /etc/php/7.2/cli/conf.d/20-fileinfo.ini
- /etc/php/7.2/cli/conf.d/20-ftp.ini
- /etc/php/7.2/cli/conf.d/20-gettext.ini
- /etc/php/7.2/cli/conf.d/20-iconv.ini
- /etc/php/7.2/cli/conf.d/20-json.ini
- /etc/php/7.2/cli/conf.d/20-phar.ini
- /etc/php/7.2/cli/conf.d/20-posix.ini
- /etc/php/7.2/cli/conf.d/20-readline.ini
- /etc/php/7.2/cli/conf.d/20-shmop.ini
- /etc/php/7.2/cli/conf.d/20-sockets.ini
- /etc/php/7.2/cli/conf.d/20-sysvmsg.ini
- /etc/php/7.2/cli/conf.d/20-sysvsem.ini
- /etc/php/7.2/cli/conf.d/20-sysvshm.ini
- /etc/php/7.2/cli/conf.d/20-tokenizer.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
steve@laptop ~ $ php --ini
steve@laptop ~ $ php --version
PHP 7.2.0-2+ubuntu16.04.1+deb.sury.org+2 (cli) (built: Dec 7 2017 20:14:31) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.2.0-2+ubuntu16.04.1+deb.sury.org+2, Copyright (c) 1999-2017, by Zend Technologies
steve@laptop ~ $ sudo apt-get install php-xml
[sudo] password for steve:
Reading package lists... Done
Building dependency tree
Reading state information... Done
php-xml is already the newest version (1:7.1+55+ubuntu16.04.1+deb.sury.org+1).
0 to upgrade, 0 to newly install, 0 to remove and 253 not to upgrade.
I did search in php.ini for ext-xml to see if I could uncomment it in order to enable it but I did not find any mention of ext-xml. I have not searched anywhere else because I am very unsure about what I am doing.
我确实在 php.ini 中搜索了 ext-xml 以查看是否可以取消注释以启用它，但我没有找到任何提及 ext-xml 的内容。我没有搜索过其他任何地方，因为我非常不确定自己在做什么。
Any help would be very much appreciated, Steve
非常感谢任何帮助，史蒂夫
回答by astrangeloop
It looks like you're using ubuntu 16.04 with the ondrej/php ppa to get the latest version of php. In this case, the package names need to match the version of php you're using:
看起来您正在使用 ubuntu 16.04 和 ondrej/php ppa 来获取最新版本的 php。在这种情况下，包名需要与您使用的 php 版本匹配：
apt-get install php7.2-xml
You can see the different versions available with something like this:
您可以看到可用的不同版本，如下所示：
apt-cache search php | grep xml
Depending on your configuration, you may need to prefix the installation command with sudo.
根据您的配置，您可能需要在安装命令前加上sudo.
回答by Anson Thomas
Try out Step 1:
尝试第 1 步：
sudo apt install php-xml
Step 2: Restart apache
第二步：重启apache
Resolved my issue
解决了我的问题
回答by rodrigo ortiz
Remove all versions for php and install only one version
删除所有版本的 php 并只安装一个版本
