为什么可以'；我在ssh上运行composer安装，即使php版本正确吗？

服务器使用的默认php版本是5.6，我需要7.1，所以我最近安装了7.1版。当我运行命令

php-v

时，它显示的是PHP5.6，因此我使用

echo'alias php=“/opt/cpanel/ea-php71/root/usr/bin/php”>~/.bashrc

来更改别名，它之所以成功，是因为它现在显示的是PHP7.1.32（cli）。但是我仍然无法使用ssh在CentOS服务器上运行

composer安装

，它显示了错误

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - This package requires php ^7.1.3 but your PHP version (5.6.40) does not satisfy that requirement.
  Problem 2
    - beyondcode/laravel-dump-server 1.3.0 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.2.2 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.2.1 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.2.0 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.1.3 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.1.2 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.1.1 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.1.0 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.0.0 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - beyondcode/laravel-dump-server 1.3.0 requires php ^7.1 -> your PHP version (5.6.40) does not satisfy that requirement.
    - Installation request for beyondcode/laravel-dump-server ^1.0 -> satisfiable by beyondcode/laravel-dump-server[1.0.0, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.2.0, 1.2.1, 1.2.2, 1.3.0].

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尝试关闭PHP5.6模块并启用最近安装的PHP7，如果我没记错的话，您可以切换希望php运行的版本。您可以按照下面的答案@Kevin我刚才用alias做的我现在用的是7.1，但composer没有看到它。composer将查看您的

$PATH

，找到第一个可执行的php并使用它执行任务，因此您的别名在这里不起作用

PATH=“/opt/cpanel/ea-php71/root/usr/bin/php:${PATH}”

将此添加到您的.bashrc中，应该可以工作了