Question

我有一个嵌套的关联数组，如下所示：

$inputTypes= array( 
    "natural" => array(
        "text",
        "password",
        "textarea",
        "radio",
        "checkbox",
        "file"
    ),
    "hybrid" => array(
        "image",
        "date" ,
        "url",
        "email"
    )
);

我想打印其键名，应用如下代码：

foreach ($inputTypes as $inputs){
    echo key($inputTypes).'<br>';
}

但是我得到了这个输出

hybrid
hybrid

我如何获得每个键的名称，谢谢。

Answer 1

foreach ($inputTypes as $key => $value){
    echo $key.'<br>';
}

Answer 2

这应该有效

foreach ($inputTypes as $key=>$value){
    echo $key.'<br>';
}

Answer 3

foreach计数器与内部数组指针冲突。

$c = count($inputTypes);
for($i=0;$i<$c;$i++){
    echo key($inputTypes).'<br>';
    next($inputTypes);
}

Answer 4

您可以使用$ key =＆gt; $ VAL

$inputTypes= array( 
        "natural" => array("text", "password","textarea", "radio", "checkbox", "file"),
        "hybrid" => array("image", "date" , "url", "email")
);

foreach ($inputTypes as $key => $val){
    echo $key.'<br>';
}

Answer 5

试试这个：

foreach ($inputTypes['natural'] as $n)
    echo "$n<br/>";

foreach ($inputTypes['hybrid'] as $h)
    echo "$h<br/>";

关联数组的关键名称

5 个答案: