Question

如何使用关联数组显示此类数据：

array(20) {
  [0]=>
  array(7) {
    ["url"]=>
    string(89) "URL Here"
    ["title"]=>
    string(42) "Title Here"
    ["author_url"]=>
    string(51) "Author Link Here"
    ["author"]=>
    string(14) "Author"
    ["published"]=>
    string(14) "Date"
    ["img_url"]=>
    string(73) "Image Link Here"
    ["teaser"]=>
    string(352) "Lorem Ipsum"
  }

}

我知道使用foreach($string as $key=>value)是第一步，但我想知道如何使用它来回显值，然后在html元素中提供它们，以便上面的数据显示内容：

URL:URL Here TITLE: Title Here AUTHOR_URL: Author Link Here AUTHOR: Author PUBLISHED: Date TEASER: Lorem Ipsum

提前感谢您提出任何建议。

Answer 1

这里有一个嵌套数组，你需要2个foreach：

foreach ($array as $values) {
    foreach ($values as $key => $v) {
        printf("%s: %s\n", $key, $v);
    }
}

Answer 2

将第二个foreach嵌入第一个foreach：

echo '<p>';
foreach($array as $value)
{
    foreach($value as $innerKey => $innerValue)
    {
        echo strtoupper($innerKey).': '.$innerValue;
        echo '<br/>';
    }
}
echo '</p>';

Answer 3

简单的解决方案，无法处理格式化：

print_r($string);

更灵活的解决方案，使用格式化递归函数：

function custom_print_r($expression, $indent = 1) {
    $buffer = '';
    $str_indent = str_pad('', $indent * 2, ' ');
    $arr_format = "[\n%s\n" . str_pad('', ($indent - 1) * 2 , ' ') . "]";
    $row_format = "$str_indent%s => %s,\n";
    $val_format = "%s";

    if (is_array($expression)) {
        $subbuffer = '';
        foreach($expression as $key => $value) {
            $subbuffer .= sprintf($row_format, $key, custom_print_r($value, $indent + 1));
        }
        $buffer .= sprintf($arr_format, $subbuffer);
    } elseif (is_object($expression)) {
        $subbuffer = '';
        foreach(get_object_vars($expression) as $key => $value) {
            $subbuffer .= sprintf($row_format, $key, custom_print_r($value, $indent + 1));
        }
        $buffer .= sprintf($arr_format, $subbuffer);
    } else {
        $buffer .= sprintf($val_format, $expression);
    }
    return $buffer;
}
$arr = [
    [
    "url" =>"URL Here",
    "title" => "Title Here",
    "author_url" => "Author Link Here",
    "author" => "Author",
    "published" => "Date",
    "img_url" => "Image Link Here",
    "teaser" => "Lorem Ipsum",
  ]
];

echo custom_print_r($arr);

/** Will produce :
[
  0 => [
    url => URL Here,
    title => Title Here,
    author_url => Author Link Here,
    author => Author,
    published => Date,
    img_url => Image Link Here,
    teaser => Lorem Ipsum,

  ],

]
**/

访问数组内容

3 个答案: