如何访问数组元素 [英] How to access array elements

问题描述

我得到的是var_dump:

I am getting this as var_dump:

array(1) {
  [0]=>
  array(4) {
    ["num"]=>
    string(1) "1"
    ["yyyy"]=>
    string(4) "2013"
    ["mm"]=>
    string(2) "12"
    ["dd"]=>
    string(2) "11"
  }
}

如何访问数组元素?

推荐答案

让我们假设您的数组为$ arr，您可以这样做

Let's assume your array is $arr, you can do

echo $arr[0]['num'];
echo $arr[0]['yyyy'];
echo $arr[0]['mm'];
echo $arr[0]['dd'];

从数据库中获取数据时，您将为每个结果行收到一个数组，并且在每个数组中将有另一个列数组.您可以使用foreach()循环遍历数据，如下所示:

As you are fetching from a database, you will receive an array for each result row, and within each array will be another array of columns. you can use a foreach() loop to iterate over the data, as follows:

foreach($arr as $row) {
    echo $row['num'] . ':' . $row['yyyy'] . '-' . $row['mm'] . '-' . $row['dd'] . "\n";
}

这篇关于如何访问数组元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！