如何使用代码点火器显示逗号分隔的值

Question

我使用的代码点火器得到逗号分隔的值，但不能正常工作。在选通结果后，我共享所有代码，如第一次输出预测值，但不显示逗号分隔值，而不是第二次显示数组打印值，而非输出逗号分隔值，如SLR、

模型代码在这里

public function display_coach_name($coachID='')
            {   
        $db2 = $this->load->database('rail',TRUE);
        $ids = explode(',',$coachID);
        $db2->select('coach_name');
        $db2->from('mcc_coach');
        $db2->where_in('id',$ids);
        $query = $db2->get();
        //echo $db2->last_query(); die;

        if ($query->num_rows() > 0):

        return $query->result_array();
        else:
            return 0;
        endif;
            }

输出

<?php foreach ($coachname as $val){ echo $pizza = $val['coach_name']; }?>

//---------------------foreach-----------------output

SLRACCN

数组打印

$coachname = $this->rail_ceil_model->display_coach_name($coachID);
echo"<pre>";
print_r($coachname);
//---------------------output----------------------
    Array
    (
        [0] => Array
            (
                [coach_name] => GS
            )

        [1] => Array
            (
                [coach_name] => SLR
            )

    )

    Array
    (
        [0] => Array
            (
                [coach_name] => GS
            )

        [1] => Array
            (
                [coach_name] => SLR
            )

    )

    Array
    (
        [0] => Array
            (
                [coach_name] => GS
            )

        [1] => Array
            (
                [coach_name] => SLR
            )

    )

    Array
    (
        [0] => Array
            (
                [coach_name] => GS
            )

        [1] => Array
            (
                [coach_name] => SLR
            )

    )

我需要输出

苏丹独立共和国

Answer 1

可以使用内爆函数将数组转换为逗号分隔的值。

$coachname = $this->rail_ceil_model->display_coach_name($coachID);
foreach($coachname as $val){
if(is_array($val)){
   $list .= $val['coach_name'].',';        
}}

print_r(substr ( $list , 0 , strlen($list) -1 )); 

或

$coachname = $this->rail_ceil_model->display_coach_name($coachID);
print_r(implode(', ', array_map('coach_name', $coachname))); 

或

echo implode(', ', array_column($coachname, 'coach_name'));

Answer 2

您可以使用内爆函数获取逗号分隔的值。

<?php
$coachname = array("ACCN", "SLR", "CN");
$new = implode(',',$coachname);
echo $new;
?>

产出将是：

ACCN,SLR,CN

相应地编辑代码。

Answer 3

请使用array_map函数，然后使用内爆函数

$coachname_separated = array_map (function($value){
    return $value['coach_name'];
} , $coachname);

$List = implode(', ', $coachname_separated); 

echo $List;