Question

我在PHP中有这个代码：

$rules = array(
    "s0" => array(
        "a" => "s1_s2_s3",
        "b" => "s2_s3"    
    ),
    "s1_s2" => array(
        "a" => "s1_s2",
        "b" => "s2_s3"
    ),
);

想要像这样打印：

s0 -- a --- s1_s2_s3
s0 -- b --- s2_s3
s1_s2 -- a --- s1_s2
s1_s2 -- b --- s2_s3

我该怎么做？

Answer 1

您就是这样做的：

$rules = array(
    "s0"  => array(
        "a" => "s1_s2_s3",
        "b" => "s2_s3"
    ),
    "s1_s2" => array(
        "a" => "s1_s2",
        "b" => "s2_s3"
    ),
);


foreach ($rules as $key => $args) {
    foreach ($args as $key2 => $vals) {
        print $key . ' -- ' . $key2 . ' --- ' . $vals . '<br>';
    }
}

编辑阵列

您可以使用array_push或[]。

array_push($rules, ['another' => ['c' => 'value']]);
$rules['another'] = ['c' => 'value']];

在索引处添加或更新数组：

$rules['another']['c'] = 'change c value';

Answer 2

要实现这一点，您必须遍历数组。要做到这一点，你需要一个循环，在PHP中，有一个函数foreach。这是一个例子 -

给定数组：

$rules = array("s0" => array("a" => "s1_s2_s3",
                              "b" => "s2_s3"    
                              ),
               "s1_s2" => array("a" => "s1_s2",
                                "b" => "s2_s3"
                               )
                );

foreach ($rules as $key => $value) {
    foreach ($value as $sub_key => $sub_val) {
        echo "<p>".$key." -- ".$sub_key." --- ".$sub_val."</p>";
    }
}

foreach构造提供了一种迭代数组的简单方法。

<强>输出：

s0 -- a --- s1_s2_s3
s0 -- b --- s2_s3
s1_s2 -- a --- s1_s2
s1_s2 -- b --- s2_s3

打印多维数组

2 个答案: