正如标题所述,我正在尝试使用Bootstrap的TyPEahead.js,它需要@L_126_1@像这样的 JSON字符串

VAR subjects = ['PHP','MysqL','sql','Postgresql','HTML','CSS','HTML5','CSS3','JSON'];

但是我有一个多维数组,在执行json_encode时会返回以下内容

[{"username":"test1"},{"username":"test2"},{"username":"test3"},{"username":"Test4"},{"username":"Test5"},{"username":"Test6"}]

我尝试使用此数组时,Typeahead.js会抛出错误.

我如何将多维转换为示例？

原始PHP数组

Array
(
[0] => Array
    (
        [username] => Test1
    )

[1] => Array
    (
        [username] => Test2
    )

[2] => Array
    (
        [username] => Test3
    )

[3] => Array
    (
        [username] => Test4
    )

[4] => Array
    (
        [username] => Test5
    )

[5] => Array
    (
        [username] => Test6
    )

)

Desired outcome would be

var subjects = ['Test1','Test2','Test3','Test4','Test5','Test6'];

echo json_encode(array_map(function($x) { return $x['username']; },$original_array));