Question

这是我用PHP打印的数组

Array ( [0] => Array ( [friend_id] => 1 [name] => parker[email] => parker@gmail.com)[1] => Array ( [friend_id] => 2 [name] => peter [email] => peter@hotmail.com) )

我可以知道如何在php中使用循环在数组中添加一个新项目/参数

Array ( [0] => Array ( [friend_id] => 1 [name] => parker[email] => parker@gmail.com [NEWOBJECT] => newvalue)[1] => Array ( [friend_id] => 2 [name] => peter [email] => peter@hotmail.com [NEWOBJECT] => newvalue) )

Answer 1

不需要循环，你可以这样添加：

<?
 $arr =  Array ( [0] => Array ( [friend_id] => 1 [name] => parker[email] => parker@gmail.com)[1] => Array ( [friend_id] => 2 [name] => peter [email] => peter@hotmail.com) );

 $arr[0]['NEWOBJECT'] = 'blablabla';
 $arr[1]['NEWOBJECT'] = 'blablabla';
?>

但是当你必须这样做超过2次时，这会有所帮助：

<?

$arr =  Array ( [0] => Array ( [friend_id] => 1 [name] => parker[email] => parker@gmail.com)[1] => Array ( [friend_id] => 2 [name] => peter [email] => peter@hotmail.com) );

 foreach($arr as $key => $value){
    $arr[$key]['NEWOBJECT'] = 'blablabla';
 }

?>

Answer 2

您可以使用foreach loop来迭代项目，并按以下方式添加新密钥。

foreach($array as &$item) {
    $item['newkey'] = "New Value";
}

请注意使用＆号（＆amp;）运算符。这可以确保我们引用$ item而不是副本，这意味着更改将影响原始$ item。

如何在数组中添加新项

2 个答案: