使用composer提示[ErrorException ]proc_get_status() has been disa
从错误提示信息中可以看到是因为关闭了PHP的proc_get_status()函数，那么如何解决这个问题呢？
打开php.ini文件，搜索 disable_functions，找到如下类似内容：
disable_functions=passthru,exec,system,chroot,scandir,chgrp,chown,shell_exec,proc_get_status,proc_open,popen,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,stream_socket_server
找到proc_get_status并删除然后重启php服务。
解决上面的提示后继续使用composer又出现了新的错误提示：[Symfony\Component\Process\Exception\RuntimeException] The Process class relies on proc_open，如图：
这个是缺少了PHP的proc_open函数，解决方法同样是打开php.ini文件搜索disable_functions，删除proc_open。
disable_functions=passthru,exec,system,chroot,scandir,chgrp,chown,shell_exec,proc_open,popen,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,stream_socket_server中的proc_open并重启php服务。
然后使用composer就正常了，上面两个问题可以看出用composer来安装drupal8模块需开启proc_open和proc_open这两个PHP函数。
2,错误：1，Warning: Module 'mysqli' already loaded in Unknown on line 0。2，Deprecated: Directive 'track_errors' is deprecated in Unknown on line 0
解决办法：
1，进入php.ini 把;extension=mysqli注释掉就可以了
2，修改 php.ini
track_errors=On
为
track_errors=Off
3，（1）>composer create-project topthink/think=5.0.* tp5 --prefer-dist
出错：[Composer\Downloader\TransportException] Content-Length mismatch, received 66895 bytes out of the expected 1916381
解决办法：>composer config repo.packagist composer https://packagist.phpcomposer.com
（2）>composer config repo.packagist composer https://packagist.phpcomposer.com
出错：File "./composer.json" cannot be found in the current directory
解决办法：加上 -g [ --global ] 就可以了,用全局配置就不用去找 composer.json 文件了
（3）>composer require topthink/think-captcha
出错：[Composer\Downloader\TransportException] Content-Length mismatch, received 28935 bytes out of the expected 1871484
解决办法： 更换源 composer config repo.packagist composer https://packagist.phpcomposer.com（4）>composer require topthink/think-captcha
出错：
Using version ^3.0 for topthink/think-captcha
./composer.json has been updated
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
- topthink/think-captcha v3.0.2 requires topthink/framework ^6.0.0 -> satisfiable by topthink/framework[6.0.x-dev, v6.0.0, v6.0.0-rc2, v6.0.0-rc3, v6.0.0-rc4, v6.0.0-rc5, v6.0.1, v6.0.2] but these conflict with your requirements or minimum-stability.
- topthink/think-captcha v3.0.1 requires topthink/framework ^6.0.0 -> satisfiable by topthink/framework[6.0.x-dev, v6.0.0, v6.0.0-rc2, v6.0.0-rc3, v6.0.0-rc4, v6.0.0-rc5, v6.0.1, v6.0.2] but these conflict with your requirements or minimum-stability.
- topthink/think-captcha v3.0.0 requires topthink/framework ^6.0.0 -> satisfiable by topthink/framework[6.0.x-dev, v6.0.0, v6.0.0-rc2, v6.0.0-rc3, v6.0.0-rc4, v6.0.0-rc5, v6.0.1, v6.0.2] but these conflict with your requirements or minimum-stability.
- Installation request for topthink/think-captcha ^3.0 -> satisfiable by topthink/think-captcha[v3.0.0, v3.0.1, v3.0.2].
Installation failed, reverting ./composer.json to its original content.
以上原因：不匹配composer.json要求的版本。captcha=1.* 如果不加=号也就下载最新版本的。也就是说tp6使用 captcha v3.*，tp5.0 使用captcha v1.*
解决方案：看自己的tp版本是多少就用什么版本的captcha