Parse error: syntax error, unexpected '|', expecting variable (T_VARIABLE) Symfony PHP VERSION WAMP Windows

Question

I have some syntax errors from symfony vendor when i'm trying to composer install my project.

Parse error: syntax error, unexpected '|', expecting variable (T_VARIABLE) vendor\psr\log\src\LoggerInterface.php on line 30

With several search, I saw the problem is from PHP version (have to be > 7.1), but actually my version is 7.4.9, this is a local machine, i'm working with WAMP on Windows. Symfony 4.4 version. Already tried to delete vendor, .lock...

Here the php version from phpinfo()

Here php version from wamp

Here php version from CLI php-v

Here my composer.json

{
"type": "project",
"license": "proprietary",    
"require": {
    "php": ">=7.1.3",
    "ext-ctype": "*",
    "ext-iconv": "*",
    "doctrine/annotations": "^1.13",
    "mongodb/mongodb": "^1.10@dev",
    "ramsey/uuid": "^4.2",
    "symfony/console": "4.4.*",
    "symfony/dotenv": "4.4.*",
    "symfony/flex": "^1.3.1",
    "symfony/form": "4.4.*",
    "symfony/framework-bundle": "4.4.*",
    "symfony/messenger": "4.4.*",
    "symfony/yaml": "4.4.*"
},
"require-dev": {
},
"minimum-stability": "dev",
"config": {
    "preferred-install": {
        "*": "dist"
    },
    "sort-packages": true,
    "platform": {
        "php": "7.4.9"
    }
},
"autoload": {
    "psr-4": {
        "App\\": "src/"
    }
},
"autoload-dev": {
    "psr-4": {
        "App\\Tests\\": "tests/"
    }
},
"replace": {
    "paragonie/random_compat": "2.*",
    "symfony/polyfill-ctype": "*",
    "symfony/polyfill-iconv": "*",
    "symfony/polyfill-php71": "*",
    "symfony/polyfill-php70": "*",
    "symfony/polyfill-php56": "*"
},
"scripts": {
    "auto-scripts": {
        "cache:clear": "symfony-cmd",
        "assets:install %PUBLIC_DIR%": "symfony-cmd"
    },
    "post-install-cmd": [
        "@auto-scripts"
    ],
    "post-update-cmd": [
        "@auto-scripts"
    ]
},
"conflict": {
    "symfony/symfony": "*"
},
"extra": {
    "symfony": {
        "allow-contrib": false,
        "require": "4.4.*"
    }
}
}

Have some idea ?

Answer 1

I added this in the composer.json and it worked.

"config": {
        "platform": {
            "php": "7.4.21"
         }
   }

The run. composer update

This downgraded psr/log to a lower version from 2.0 and resolved my issue.