Question

我使用下面的代码，

    $i = 0; $comma = NULL;
foreach($messages->get_logged_agents_dep(60) as $val_dep)
{
    echo $department_id = $val_dep['department_id'].$comma;
}

我想把逗号（，）结束于department_id（就像我在$逗号变量中提到的那样）但是最后一个值不应该放入逗号（，），因为我想把上面的值放到SELECT * FROM tb_name WHERE IN（1,2,3）中这样，请帮我解决这个问题。尊重你的回应。

谢谢！

Answer 1

试试这个： -

foreach($messages->get_logged_agents_dep(60) as $val_dep)
{
    $department_id[] = $val_dep['department_id'];
}

echo $department_val =  implode(",",$department_id);

Answer 2

更改代码，在序列的其他成员上添加逗号，而不是。

$i = 0; 
$comma = ',';
foreach(...)
{
   echo ($i++>0)? $comma:'';
   echo $department_id = $val_dep['department_id'];
}

Answer 3

您也可以使用rtrim()

$department_id  = '';
foreach($messages->get_logged_agents_dep(60) as $val_dep) {
    $department_id .= $val_dep['department_id'].',';
}
rtrim($department_id,','); // to trim last comma

Answer 4

使用implode（）。见http://php.net/manual/en/function.implode.php

$i = 0; $arrIds = array();
foreach($messages->get_logged_agents_dep(60) as $val_dep)
{
    $arrIds[] = $val_dep['department_id'];
}
echo implode(',', $arrIds);

在Mysql PHP中的值之后添加逗号

4 个答案: