Question

我查了一堆类似的例子，但似乎无法弄清楚如何循环并回显此数组中的值。应该很简单，但我很密集。感谢帮助。

array(2) { ["legend_size"]=> int(1) ["data"]=> array(2) { ["series"]=> array(2) { [0]=> string(10) "2014-01-17" [1]=> string(10) "2014-01-18" } ["values"]=> array(1) { ["Begin Session"]=> array(2) { ["2014-01-17"]=> int(1073) ["2014-01-18"]=> int(1122) } } } }

我正在尝试返回“values”数组的int值。

Answer 1

鉴于您的数组的名称，例如$mdarr，并且数组的构造每次都大致相同，它就像这样简单：

$values_i_want = $mdarr['data']['values'];

如果您要查找的values数组在不同的情况下将处于不同的数组深度，则递归与类型检查结合将起到作用：

//returns values array or nothing if it's not found
function get_values_array($mdarr) {
    foreach ($mdarr as $key => $val) {
        if ($key == 'values') {
            return $val;
        } else if (is_array($val)) {
            return get_values_array($val);
        }
    }
}

Answer 2

使用以下作为基础。我重建了你的阵列，所以我可以搞砸它。

$turtle = array('legend_size' => 'int(1)', 'data' =>array('series' => array('string(10) "2014-01-17"', '[1]=> string(10) "2014-01-18"'), 'values' => array('Begin_Session' =>array('2014-01-17' => 'int(1073)', '2014-01-18' => 'int(1122)'))));

// This is where you "navigate" the array by using [''] for each new array you'd like to traverse. Not sure that makes much sense, but should be clear from example.
foreach ($turtle['data']['values']['Begin_Session'] as $value) {
    $match = array();
// This is if you only want what's in the parentheses. 
    preg_match('#\((.*?)\)#', $value, $match);
    echo $match[1] . "<br>";
}

Answer 3

如果数组结构不会改变，并且您只想要values内的int值，则可以执行以下操作：

//Create array
$some_array = array( 
    "legend_size" => 5, 
    "data" => array( 
        "series" => array(0 => "2014-01-17", 1 => "2014-01-18" ) 
        "values" => array(
            "Begin Session" => array("2014-01-17" => 1000, "2014-01-18" => 1000)
        )
    )
);

//Get values
foreach($some_array['data']['values'] as $key => $value)
{
    if(is_array($value))
    {
        echo $key . " => ";

        foreach($value as $key2 => $value2)
        {
             echo "   " . $key2 . " => " . $value2;
        }
    }

    else
    {
        echo $key . " => " . $value;
    }
}

这将为您提供如下输出：

Begin Session =>
    2014-01-17 => 1000
    2014-01-18 => 1000

在PHP中循环使用多维数组

3 个答案: