Php7环境的版本是不是随机的？demo的composer.json php>7.2.5 过了，自己部署的时候挂了 #24
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Fatal error: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.2.5". You are running 7.2.2. in /var/user/vendor/composer/platform_check.php on line 24