Foreach kann kein Array in PHP erstellen

Question

Code:

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

Warum enthält der Ausgabe-JSON nur einen Inhalt?

Answer 1

亲，多看手册，掌握下语法哦。

<?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);
?>