获取每个数组元素的键值

Question

$arr = ['night' => 'black', 'sun' => 'light', 'she' => 'gold'];

foreach ($arr as $el) {
    echo ... . '<br>';
}

结果应为：

晚上
太阳
她

谢谢

Answer 1

您应该使用：

<?php $array_keys = array_keys($your_array);

Answer 2

您可以这样打印密钥名称：

$arr = ['night' => 'black', 'sun' => 'light', 'she' => 'gold'];

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

输出：

night 
sun 
she 

Answer 3

尝试

$key包含您所有的数组键，$value包含您所有的值

$arr = ['night' => 'black', 'sun' => 'light', 'she' => 'gold'];

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