para yii2 especificar en el config la version de php

 "require-dev": {
        "yiisoft/yii2-debug": "~2.1.0",
        "yiisoft/yii2-gii": "~2.1.0",
        "yiisoft/yii2-faker": "~2.0.0",
        "codeception/base": "^2.4.0",
        "phpunit/phpunit": "~6.5.5",
        "codeception/verify": "~1.0.0",
        "symfony/browser-kit": ">=2.7 <=4.2.4"
    },
      "config": {
        "process-timeout": 1800,
         "discard-changes": true,
	 "platform": {
      "php": "7.4.33"
	},
       "allow-plugins": {
            "yiisoft/yii2-composer": true
        }
    },