Foreach fails to build array in php

Question

Code:

<?php
$arr=array();
foreach($data as $row){
    $arr['name']=$row->user->username;
    $arr['time']=$row->user->time;
};
echo json_encode($arr);
?>

Why does the output json have only one piece of content?

Answer 1

Dear, read the manual more and master the grammar.

<?php
$arr=array();
foreach($data as $row){
    $t['name']=$row->user->username;
    $t['time']=$row->user->time;
    $arr[] = $t;
};
echo json_encode($arr);
?>

Answer 2

<?php
$arr=array();
foreach($data as $key=>$row){
    $arr[$key]['name']=$row->user->username;
    $arr[$key]['time']=$row->user->time;
};
echo json_encode($arr);
?>