Question

我是一个php初学者，想要做以下事情：当我var_dump一个名为get_values（）的函数时，这就是输出：

array(2) { 
    [0]=> object(stdClass)#1033 (9) { 
        ["sub_id"]=> string(1) "1" 
        ["sub_email"]=> string(18) "mail@site.com" 
        ["sub_name"]=> string(7) "John" 
        ["sub_last_name"]=> string(0) "" 
        ["sub_key"]=> string(34) "..." 
        ["created"]=> string(19) "2015-02-17 11:37:49" 
        ["status"]=> string(1) "1" 
        ["sola_nl_mail_sent"]=> string(1) "0" 
        ["sola_nl_mail_sending_time"]=> string(19) "0000-00-00 00:00:00" 
    } 
    [1]=> object(stdClass)#858 (9) { 
        ["sub_id"]=> string(2) "10" 
        ["sub_email"]=> string(19) "mail2@site.com" 
        ["sub_name"]=> string(8) "Doe" 
        ["sub_last_name"]=> string(0) "" 
        ["sub_key"]=> string(34) "..." 
        ["created"]=> string(19) "2015-02-24 03:04:58" 
        ["status"]=> string(1) "1" 
        ["sola_nl_mail_sent"]=> string(1) "1" 
        ["sola_nl_mail_sending_time"]=> string(19) "0000-00-00 00:00:00" 
    }
}

现在我想输出一个只包含电子邮件的数组：

$ emails = array（＆＃39; mail@site.com'，＆＃39; mail2@site.com'）;

有人可以帮助我，存档吗？

Answer 1

这应该适合你：

<?php

    $data = get_values();
    $emails = array();

    foreach($data as $v)
        $emails[] = $v->sub_email;

    print_r($emails);

?>

Answer 2

用户foreach：

$arrData = get_values();
$emails = array();
foreach($arrData as $val) {
    $emails[] = $val->sub_email;
}

Answer 3

使用array_map

$emails = array_map(function ($value) {
    return $value->sub_email;
}, get_values());

获取数组中类的值

3 个答案: