tp5后台同步更新配置文件

thinkphp5 配置文件路径：app/extra/web.php

public function add(){
     $path = 'app/extra/web.php';
     $file = include $path;
     $config = array(
      'WEB_TIT' => input('WEB_TIT'),
       'WEB_COM' => input('WEB_COM'),
       'WEB_ICP' => input('WEB_ICP'),
       'WEB_KEY' => input('WEB_KEY'),
       'WEB_DES' => input('WEB_DES'),
     'WEB_PHONE' => input('WEB_PHONE'),
     'WEB_EMAIL' => input('WEB_EMAIL'),
     'WEB_ADD' => input('WEB_ADD'),
     'WEB_PC' => input('WEB_PC'),
     );
     $res = array_merge($file, $config);
     $str = '<?php return [';

     foreach ($res as $key => $value){
         $str .= '\''.$key.'\''.'=>'.'\''.$value.'\''.',';
     };
     $str .= ']; ';
     if(file_put_contents($path, $str)){
         return json(array('code'=>200,'msg'=>'修改成功'));
     }else {
         return json(array('code'=>0,'msg'=>'修改失败'));
     }
  }