Codeigniter:无法回显数据 [英] Codeigniter: Unable to echo data

问题描述

好人，

我的功能有一个奇怪的问题.

I have an odd issue with a function of mine.

public function getOutages($Site)
{
    // pull a json data dump of all outages 
    If(!$Site){
        echo '[{}]';
    }else{
        $this->load->database('default', TRUE);
        $this->db->where('Clear', '0');
        $this->db->where('FracID', $Site);
        $query = $this->db->get('vw_Outages');

        echo json_encode($query->result_array());
    }
}

直接进入时不会回显任何内容.通过启用探查器，尽管它可以正常运行并输出数据.

This when accesed directly will not echo anything. By enabling the profiler though it functions fine and outputs the data.

public function getOutages($Site)
{
$this->output->enable_profiler(TRUE);
    // pull a json data dump of all outages 
    If(!$Site){
        echo '[{}]';
    }else{
        $this->load->database('default', TRUE);
        $this->db->where('Clear', '0');
        $this->db->where('FracID', $Site);
        $query = $this->db->get('vw_Outages');

        echo json_encode($query->result_array());
    }
}

任何对此的见解都将是受欢迎的:D.

Any insight into this would be more then welcome :D .

推荐答案

CodeIgniter具有输出缓冲系统(它也可以执行缓存控制器输出，设置标头和收集视图输出之类的操作).通常，您不使用控制器方法来echo.改为执行此操作:

CodeIgniter has an output buffering system (which also allows it to do things like cache controller output, set headers, and collect view output). You don't usually echo from a controller method. Do this instead:

public function mymethod() {
    $anobject = array();
    $output = json_encode($anobject);

    $this->output->set_content_type('application/json');
    $this->output->set_output($output);
}

请参见 Output类的CodeIgniter文档.

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