我尝试使用 PHP 部署器部署 laravel 5.6。该站点已成功部署。但是我在尝试访问该网站时看到以下错误，
Parse error: syntax error, unexpected '?', expecting variable
(T_VARIABLE) in /mnt/data/sites/laravel_deployer/releases/5/vendor/symfony/http-foundation/Request.php on line 1587
PHP 信息页面显示，该站点使用 PHP 7.0.27 运行
而部署服务器中的默认 PHP 版本是 7.1。
[surendar.m@testmachine current]$ php -v
PHP 7.1.17 (cli) (built: May 10 2018 17:38:04) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies
我有以下疑惑，
- 为什么部署的站点没有使用系统默认的 PHP 版本？
- 这是因为 PHP 版本不匹配我在尝试访问网站时遇到解析错误吗？
我的作曲家版本是 1.9.1
Composer.json 文件如下，
{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
"php": "^7.1.3",
"fideloper/proxy": "^4.0",
"laravel/framework": "5.6.*",
"laravel/tinker": "^1.0"
},
"require-dev": {
"filp/whoops": "^2.0",
"fzaninotto/faker": "^1.4",
"mockery/mockery": "^1.0",
"nunomaduro/collision": "^2.0",
"phpunit/phpunit": "^7.0"
},
"autoload": {
"classmap": [
"database/seeds",
"database/factories"
],
"psr-4": {
"App\\": "app/"
}
},
"autoload-dev": {
"psr-4": {
"Tests\\": "tests/"
}
},
"extra": {
"laravel": {
"dont-discover": [
]
}
},
"scripts": {
"post-root-package-install": [
"@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
],
"post-create-project-cmd": [
"@php artisan key:generate"
],
"post-autoload-dump": [
"Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
"@php artisan package:discover"
]
},
"config": {
"preferred-install": "dist",
"sort-packages": true,
"optimize-autoloader": true
},
"minimum-stability": "dev",
"prefer-stable": true
}