如何从这个json对象中删除逗号？

Question

我有一个搜索查询

$sql="SELECT user_id,user_name,user_occupation FROM profile WHERE user_email LIKE '%peace%'";

$result=mysql_query($sql);
$jsonResult = '{"results" : [ ';
while ($data=mysql_fetch_assoc($result))
{
$jsonResult .=json_encode($data).',';
}
$jsonResult .= ']}';

echo $jsonResult;

在介绍如何从数组中删除最后一个逗号(,)？,我补充说

$sql="SELECT user_id,user_name,user_occupation FROM profile WHERE user_email LIKE '%peace%'";

$result=mysql_query($sql);
$jsonResult = '{"results" : [ ';
while ($data=mysql_fetch_assoc($result))
{
$jsonResult .=json_encode($data).',';
}
$jsonResult .= ']}';

$finalResult = rtrim(',',$jsonResult);
echo $finalResult;

这给了我一个输出......

{"results" : [ {"user_id":"2","user_name":"peace","user_occupation":"Web Developer"},  
               {"user_id":"3","user_name":"lover","user_occupation":"Web Developer"}
               {"user_id":"4","user_name":"User4","user_occupation":"Developer"},
               {"user_id":"5","user_name":"User5","user_occupation":"Developer"},]}

我想从结果数组中删除最后一个逗号

Answer 1

而不是在循环中构建字符串,而是填充数组,每个元素都是结果集中的单个关联数组(行).然后,在循环之后,只需json_encode您构建的数组.