Question

我正在使用json_encode将数组转换为JSON格式。完成此操作后，我希望至少以可读的方式将此数据保存在文本文件中。这就是我到目前为止所拥有的：

$keywords = parseTweet ( $tweet, $tweet_id );
// print_r ( $keywords );

$json = json_encode ( $keywords, JSON_FORCE_OBJECT );
print_r ( $json );

$fp = fopen('index.json', 'w');
fwrite($fp, $json);
fclose($fp);

不幸的是，相应的.json文件（打开它为.txt）各自有：

{"0":{"type":"RT","frequency":1,"tweet_id":"516575570168385537"},"1":
{"type":"iGamingSummit","frequency":1,"tweet_id":"516575570168385537"},"2":
{"type":"CEO","frequency":1,"tweet_id":"516575570168385537"},"5":
{"type":"guest","frequency":1,"tweet_id":"516575570168385537"},"6":
{"type":"keynote","frequency":1,"tweet_id":"516575570168385537"},"7":
{"type":"speaker","frequency":1,"tweet_id":"516575570168385537"},"8":
{"type":"SiGMA2014","frequency":1,"tweet_id":"516575570168385537"},"9":
{"type":"http","frequency":1,"tweet_id":"516575570168385537"},"10":
{"type":"t","frequency":1,"tweet_id":"516575570168385537"},"11":
{"type":"co","frequency":1,"tweet_id":"516575570168385537"},"12":
{"type":"n5hPpTV1bH","frequency":1,"tweet_id":"516575570168385537"}}

正如你所看到的那样它是不可读的，而且我想在这个.json文件上创建一个索引，其中每个类型都出现各自的频率和推文ID，我也想按类型对这个索引进行排序，我不认为这种格式很容易实现这一点。

我希望得到这样的东西：

{"0":{
        "type":"RT",
        "frequency":1,
        "tweet_id":"516575570168385537"
  } ... etc

有没有办法格式化JSON以使其更具可读性，或者我是否应该重新考虑使用它，也许可以尝试使用CSV或更好的东西，它不会用大括号和所有＆＃34;来阻塞我的索引文件。 0＆＃34;，＆＃34; 1＆＃34; ...值？

--------更新---------

我尝试在第一个答案中使用该建议，但现在这里是文本文件的样子：

{    "0": {        "type": "app",        "frequency": 1,        "tweet_id": "561522539340771328"    },    "1": {        "type": "cat",        "frequency": 1,        "tweet_id": "561522673805975553"    },    "2": {        "type": "dog",        "frequency": 1,        "tweet_id": "561522539340771328"    },    "3": {       "type": "Deed",        "frequency": 1,        "tweet_id": "561522453118464000"    },    "4": {        "type": "deep",        "frequency": 1,        "tweet_id": "542089120651440129"    },    "5": {        "type": "dig",        "frequency": 1,        "tweet_id": "535817228927901696"    }

就好像缩进一样，但是没有以正确的方式跳过这一行输出：

{
    "0": {
        "type": "app",
        "frequency": 1,
        "tweet_id": "561522539340771328"
    },
    "1": {
        "type": "cat",
        "frequency": 1,
        "tweet_id": "561522673805975553"
    },
    "2": {
        "type": "dog",
        "frequency": 1,
        "tweet_id": "561522539340771328"
    },
    "3": {
        "type": "Deed",
        "frequency": 1,
        "tweet_id": "561522453118464000"
    },
    "4": {
        "type": "deep",
        "frequency": 1,
        "tweet_id": "542089120651440129"
    },
    "5": {
        "type": "dig",
        "frequency": 1,
        "tweet_id": "535817228927901696"
    }

这是我执行结果的代码：

$json_index = array_values($json_index);    
$json = json_encode ( $json_index, JSON_FORCE_OBJECT|JSON_PRETTY_PRINT );
print_r($json);

$index = fopen ( $index_path, 'w' );
fwrite ( $index, $json);
fclose ( $index );

我做错了什么？

Answer 1

你说你不想“用大括号和所有'0'，'1'......值来阻塞我的索引文件。”嗯，这就是JSON的定义结构。我不确定你期望与众不同。

那就是说，你可以让它更容易阅读。如果您正在寻找更漂亮的布局，包括换行符和缩进，请使用JSON_PRETTY_PRINT constant：

$keywords = parseTweet ( $tweet, $tweet_id );
// print_r ( $keywords );

$json = json_encode ( $keywords, JSON_FORCE_OBJECT | JSON_PRETTY_PRINT );
print_r ( $json );

$fp = fopen('index.json', 'w');
fwrite($fp, $json);
fclose($fp);

Answer 2

你的意思是你想要一个数组 JSON吗？像那样：

[
  {
    "type":"RT",
    "frequency":1,
    "tweet_id":"516575570168385537"
  },
  {
    "type":"iGamingSummit",
    "frequency":1,
    "tweet_id":"516575570168385537"
  },
  {
    "type":"CEO",
    "frequency":1,
    "tweet_id":"516575570168385537"
  }
]

如果是这样，您只需使用JSON_PRETTY_PRINT常量并确保您的推文数组使用array_values包含数字键。

$keywords = array_values($keywords);
$json = json_encode ( $keywords, JSON_PRETTY_PRINT );

如果我从你的样本中获取对象JSON来测试它：

<?php

$keywords = json_decode('{"0":{"type":"RT","frequency":1,"tweet_id":"516575570168385537"},"1":{"type":"iGamingSummit","frequency":1,"tweet_id":"516575570168385537"},"2":{"type":"CEO","frequency":1,"tweet_id":"516575570168385537"},"5":{"type":"guest","frequency":1,"tweet_id":"516575570168385537"},"6":{"type":"keynote","frequency":1,"tweet_id":"516575570168385537"},"7":{"type":"speaker","frequency":1,"tweet_id":"516575570168385537"},"8":{"type":"SiGMA2014","frequency":1,"tweet_id":"516575570168385537"},"9":{"type":"http","frequency":1,"tweet_id":"516575570168385537"},"10":{"type":"t","frequency":1,"tweet_id":"516575570168385537"},"11":{"type":"co","frequency":1,"tweet_id":"516575570168385537"},"12":{"type":"n5hPpTV1bH","frequency":1,"tweet_id":"516575570168385537"}}');

/*
 * Force object to array
 */
$arrayValues = array();
foreach($keywords as $value) {
    $arrayValues[] = $value;
}

// You must have at least PHP 5.4
$json = json_encode($arrayValues, JSON_PRETTY_PRINT);

$index = fopen(dirname(__FILE__).'/test.txt', 'w' );
fwrite ($index, $json);
fclose ($index);

我的test.txt文件包含：

[
    {
        "type": "RT",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "iGamingSummit",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "CEO",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "guest",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "keynote",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "speaker",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "SiGMA2014",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "http",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "t",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "co",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "n5hPpTV1bH",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    }
]

Answer 3

将其编写为CSV会使其非常具有人性化的可读性。这似乎是你的意图。

直接来自PHP.net fputscsv http://php.net/manual/en/function.fputcsv.php

<?php

$list = array (
    array('aaa', 'bbb', 'ccc', 'dddd'),
    array('123', '456', '789')
);

$fp = fopen('file.csv', 'w');

foreach ($list as $fields) {
    fputcsv($fp, $fields);
}

fclose($fp);
?>

以上示例将以下内容写入file.csv：

aaa,bbb,ccc,dddd
123,456,789

Answer 4

使用上面的例子，我解释了你的例子，然后重新编码并将其写入文件，似乎是合法的，输出为：

[
    {
        "type": "RT",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "iGamingSummit",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "CEO",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "guest",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "keynote",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "speaker",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "SiGMA2014",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "http",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "t",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "co",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    },
    {
        "type": "n5hPpTV1bH",
        "frequency": 1,
        "tweet_id": "516575570168385537"
    }
]

使用您的示例代码，如下所示：

$keywords = parseTweet ( $tweet, $tweet_id );

file_put_contents("index.json",
    json_encode(
        array_values($keywords),
        JSON_PRETTY_PRINT
    )
);

请记住，如果您将此输出读回PHP，PHP将忽略格式化，这纯粹是为了在文本编辑器或vim中打开文件。

如何使用PHP格式化.txt文件上的.json数据？

4 个答案: