Php require once在响应中添加新行

我有以下PHP类代码：

<?php

require_once CUSTOM_PATH . DIRECTORY_SEPARATOR . 'myneighborlists.php'; 

class Action_Get_route extends Frapi_Action implements Frapi_Action_Interface
{

    /**
     * Required parameters
     * 
     * @var An array of required parameters.
     */
    protected $requiredParams = array();

    /**
     * The data container to use in toArray()
     * 
     * @var A container of data to fill and return in toArray()
     */
    private $data = array();

    /**
     * To Array
     * 
     * This method returns the value found in the database 
     * into an associative array.
     * 
     * @return array
     */
    public function toArray()
    {
        //$this->data['origin'] = $this->getParam('origin', self::TYPE_OUTPUT);
        //$this->data['destination'] = $this->getParam('destination', self::TYPE_OUTPUT);
        return $this->data;
    }

    /**
     * Default Call Method
     * 
     * This method is called when no specific request handler has been found
     * 
     * @return array
     */
    public function executeAction()
    {
        $valid = $this->hasRequiredParameters($this->requiredParams);
        if ($valid instanceof Frapi_Error) {
            return $valid;
        }

        return $this->toArray();
    }

    /**
     * Get Request Handler
     * 
     * This method is called when a request is a GET
     * 
     * @return array
     */
    public function executeGet()
    {
        $valid = $this->hasRequiredParameters($this->requiredParams);
        if ($valid instanceof Frapi_Error) {
            return $valid;
        }

        return $this->toArray();
    }

    /**
     * Post Request Handler
     * 
     * This method is called when a request is a POST
     * 
     * @return array
     */
    public function executePost()
    {
        $valid = $this->hasRequiredParameters($this->requiredParams);
        if ($valid instanceof Frapi_Error) {
            return $valid;
        }

        return $this->toArray();
    }

    /**
     * Put Request Handler
     * 
     * This method is called when a request is a PUT
     * 
     * @return array
     */
    public function executePut()
    {
        $valid = $this->hasRequiredParameters($this->requiredParams);
        if ($valid instanceof Frapi_Error) {
            return $valid;
        }

        return $this->toArray();
    }

    /**
     * Delete Request Handler
     * 
     * This method is called when a request is a DELETE
     * 
     * @return array
     */
    public function executeDelete()
    {
        $valid = $this->hasRequiredParameters($this->requiredParams);
        if ($valid instanceof Frapi_Error) {
            return $valid;
        }

        return $this->toArray();
    }

    /**
     * Head Request Handler
     * 
     * This method is called when a request is a HEAD
     * 
     * @return array
     */
    public function executeHead()
    {
        $valid = $this->hasRequiredParameters($this->requiredParams);
        if ($valid instanceof Frapi_Error) {
            return $valid;
        }

        return $this->toArray();
    }


}

---

查看所需文件中的关闭标记后是否有额外的行或空格。所需文件中可能有某个内容在回显空格/行，或者文件末尾有额外的空格。
如果不查看myneightrlists.php的源代码，很难回答此问题。我的猜测是，在
检查myneightrlists.php之前，这个文件的顶部有一个空行。可能在
之前有一个额外的换行符。值得注意的是，PHP结束标记
？>
在文件末尾总是可选的。通过省略它，您可以将出现此问题的可能性减半。我非常确定它是文件末尾的空白字符+解决方案为1，metalmatriarch.com参考为+1；）