This package requires php ^7.2.5 but your PHP version (7.1.33) does not satisfy that requirement.

有个简单的错误：

Reading ./composer.json
Loading config file /root/.config/composer/config.json
Loading config file /root/.config/composer/auth.json
Loading config file ./composer.json
Checked CA file /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem: valid
Failed to initialize global composer: Composer could not find the config file: /root/.config/composer/composer.json
To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section
Running 1.9.1 (2019-11-01 17:20:17) with PHP 7.1.33 on Linux / 3.10.0-514.26.2.el7.x86_64
Reading ./composer.lock
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Reading ./composer.lock
Resolving dependencies through SAT

Dependency resolution completed in 0.000 seconds
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - This package requires php ^7.2.5 but your PHP version (7.1.33) does not satisfy that requirement.
  Problem 2
    - The requested PHP extension ext-fileinfo * is missing from your system. Install or enable PHP's fileinfo extension.
  Problem 3
    - Installation request for doctrine/dbal 2.10.2 -> satisfiable by doctrine/dbal[2.10.2].
    - doctrine/dbal 2.10.2 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 4
    - Installation request for doctrine/inflector 2.0.3 -> satisfiable by doctrine/inflector[2.0.3].
    - doctrine/inflector 2.0.3 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 5
    - Installation request for doctrine/lexer 1.2.1 -> satisfiable by doctrine/lexer[1.2.1].
    - doctrine/lexer 1.2.1 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 6
    - Installation request for hashids/hashids 4.0.0 -> satisfiable by hashids/hashids[4.0.0].
    - hashids/hashids 4.0.0 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 7
    - Installation request for laravel/framework v7.22.4 -> satisfiable by laravel/framework[v7.22.4].
    - laravel/framework v7.22.4 requires php ^7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 8
    - Installation request for laravel/tinker v2.4.1 -> satisfiable by laravel/tinker[v2.4.1].
    - laravel/tinker v2.4.1 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 9
    - Installation request for laravel/ui v2.1.0 -> satisfiable by laravel/ui[v2.1.0].
    - laravel/ui v2.1.0 requires php ^7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 10
    - Installation request for league/flysystem 1.0.70 -> satisfiable by league/flysystem[1.0.70].
    - league/flysystem 1.0.70 requires ext-fileinfo * -> the requested PHP extension fileinfo is missing from your system.
  Problem 11
    - Installation request for monolog/monolog 2.1.1 -> satisfiable by monolog/monolog[2.1.1].
    - monolog/monolog 2.1.1 requires php >=7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 12
    - Installation request for psr/event-dispatcher 1.0.0 -> satisfiable by psr/event-dispatcher[1.0.0].
    - psr/event-dispatcher 1.0.0 requires php >=7.2.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 13
    - Installation request for ramsey/collection 1.0.1 -> satisfiable by ramsey/collection[1.0.1].
    - ramsey/collection 1.0.1 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 14
    - Installation request for ramsey/uuid 4.1.0 -> satisfiable by ramsey/uuid[4.1.0].
    - ramsey/uuid 4.1.0 requires php ^7.2 || ^8 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 15
    - Installation request for symfony/console v5.1.3 -> satisfiable by symfony/console[v5.1.3].
    - symfony/console v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 16
    - Installation request for symfony/css-selector v5.1.3 -> satisfiable by symfony/css-selector[v5.1.3].
    - symfony/css-selector v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 17
    - Installation request for symfony/error-handler v5.1.5 -> satisfiable by symfony/error-handler[v5.1.5].
    - symfony/error-handler v5.1.5 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 18
    - Installation request for symfony/event-dispatcher v5.1.5 -> satisfiable by symfony/event-dispatcher[v5.1.5].
    - symfony/event-dispatcher v5.1.5 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 19
    - Installation request for symfony/event-dispatcher-contracts v2.1.3 -> satisfiable by symfony/event-dispatcher-contracts[v2.1.3].
    - symfony/event-dispatcher-contracts v2.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 20
    - Installation request for symfony/finder v5.1.3 -> satisfiable by symfony/finder[v5.1.3].
    - symfony/finder v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 21
    - Installation request for symfony/http-foundation v5.1.5 -> satisfiable by symfony/http-foundation[v5.1.5].
    - symfony/http-foundation v5.1.5 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 22
    - Installation request for symfony/http-kernel v5.1.5 -> satisfiable by symfony/http-kernel[v5.1.5].
    - symfony/http-kernel v5.1.5 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 23
    - Installation request for symfony/mime v5.1.3 -> satisfiable by symfony/mime[v5.1.3].
    - symfony/mime v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 24
    - Installation request for symfony/process v5.1.3 -> satisfiable by symfony/process[v5.1.3].
    - symfony/process v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 25
    - Installation request for symfony/routing v5.1.3 -> satisfiable by symfony/routing[v5.1.3].
    - symfony/routing v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 26
    - Installation request for symfony/service-contracts v2.1.3 -> satisfiable by symfony/service-contracts[v2.1.3].
    - symfony/service-contracts v2.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 27
    - Installation request for symfony/string v5.1.3 -> satisfiable by symfony/string[v5.1.3].
    - symfony/string v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 28
    - Installation request for symfony/translation v5.1.3 -> satisfiable by symfony/translation[v5.1.3].
    - symfony/translation v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 29
    - Installation request for symfony/translation-contracts v2.1.3 -> satisfiable by symfony/translation-contracts[v2.1.3].
    - symfony/translation-contracts v2.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 30
    - Installation request for symfony/var-dumper v5.1.5 -> satisfiable by symfony/var-dumper[v5.1.5].
    - symfony/var-dumper v5.1.5 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 31
    - Installation request for barryvdh/laravel-ide-helper v2.7.0 -> satisfiable by barryvdh/laravel-ide-helper[v2.7.0].
    - barryvdh/laravel-ide-helper v2.7.0 requires php >=7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 32
    - Installation request for facade/ignition 2.3.5 -> satisfiable by facade/ignition[2.3.5].
    - facade/ignition 2.3.5 requires php ^7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 33
    - Installation request for mockery/mockery 1.4.1 -> satisfiable by mockery/mockery[1.4.1].
    - mockery/mockery 1.4.1 requires php ^7.3 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 34
    - Installation request for nunomaduro/collision v4.2.0 -> satisfiable by nunomaduro/collision[v4.2.0].
    - nunomaduro/collision v4.2.0 requires php ^7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 35
    - Installation request for phpdocumentor/reflection-common 2.2.0 -> satisfiable by phpdocumentor/reflection-common[2.2.0].
    - phpdocumentor/reflection-common 2.2.0 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 36
    - Installation request for phpdocumentor/reflection-docblock 5.2.0 -> satisfiable by phpdocumentor/reflection-docblock[5.2.0].
    - phpdocumentor/reflection-docblock 5.2.0 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 37
    - Installation request for phpdocumentor/type-resolver 1.3.0 -> satisfiable by phpdocumentor/type-resolver[1.3.0].
    - phpdocumentor/type-resolver 1.3.0 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 38
    - Installation request for phpspec/prophecy 1.11.1 -> satisfiable by phpspec/prophecy[1.11.1].
    - phpspec/prophecy 1.11.1 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 39
    - Installation request for phpunit/php-code-coverage 7.0.10 -> satisfiable by phpunit/php-code-coverage[7.0.10].
    - phpunit/php-code-coverage 7.0.10 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 40
    - Installation request for phpunit/phpunit 8.5.8 -> satisfiable by phpunit/phpunit[8.5.8].
    - phpunit/phpunit 8.5.8 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 41
    - Installation request for sebastian/global-state 3.0.0 -> satisfiable by sebastian/global-state[3.0.0].
    - sebastian/global-state 3.0.0 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 42
    - Installation request for sebastian/type 1.1.3 -> satisfiable by sebastian/type[1.1.3].
    - sebastian/type 1.1.3 requires php ^7.2 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 43
    - Installation request for symfony/filesystem v5.1.3 -> satisfiable by symfony/filesystem[v5.1.3].
    - symfony/filesystem v5.1.3 requires php >=7.2.5 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 44
    - Installation request for theseer/tokenizer 1.2.0 -> satisfiable by theseer/tokenizer[1.2.0].
    - theseer/tokenizer 1.2.0 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
  Problem 45
    - doctrine/lexer 1.2.1 requires php ^7.2 || ^8.0 -> your PHP version (7.1.33) does not satisfy that requirement.
    - egulias/email-validator 2.1.18 requires doctrine/lexer ^1.0.1 -> satisfiable by doctrine/lexer[1.2.1].
    - Installation request for egulias/email-validator 2.1.18 -> satisfiable by egulias/email-validator[2.1.18].

  To enable extensions, verify that they are enabled in your .ini files:
    - /www/server/php/71/etc/php.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

提高PHP版本即可，最好用PHP7.3及以上。