How to determine whether the data table exists in the database in Yii

The judgment method is divided into two steps:

The first step: Find all the table names in the database. The table names are obtained as two-dimensional arrays.

Step 2: Determine whether the table name exists in the two-dimensional array.

Code example:

$table_name =‘table’;
        $juge = $handle->createCommand("show tables ")->queryAll();
//下面的deep_in_array()方法是自己写的方法，判断是否存在值是否存在二维数组中，yii2中调用本类方法，可以去掉action
        $cun =  $this->deep_in_array($table_name,$juge);
          if(!$cun){
              echo json_encode("nodata");
              return;
          }

//判断二维数组是否存在值
    public  function deep_in_array($value, $array) {   
            foreach($array as $item) {   
                if(!is_array($item)) {   
                    if ($item == $value) {  
                        return true;  
                    } else {  
                        continue;   
                    }  
                }   
                   
                if(in_array($value, $item)) {  
                    return true;      
                } else if($this->deep_in_array($value, $item)) {  
                    return true;      
                }  
            }   
            return false;   
        }

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