如何在PHP中将Json转换为CSV

miststudent2011 发表于 Dev

Miststudent2011

嗨，我正在尝试将数组格式与普通格式不同的json文件转换为csv文件。我一直在试图找到一种解决方案，将其转换为一个csv文件，但我找不到解决方案。

  <?php 
    $jsondata = '[{
        "accession_number_original": "2012.11.45",
        "author_birth_date": [
          "1932"
        ],
        "author_date": [
          "1932"
        ],
        "author_death_date": [
          ""
        ],
        "author_description": [
          "American"
        ],
        "author_display": [
          "Day yon"
        ],
        "author_names_first": [
          "Day"
        ],
        "author_names_last": [
          "yon"
        ],
        "author_names_middle": [
          ""
        ],
        "image_height": "12 1/2",
        "image_width": "18 1/4",
        "jp2_image_url": "",
        "location_physical_location": "Art Gallery",
        "location_shelf_locator": "Unknown",
        "master_image_url": "",
        "note_provenance": "Gift of Gary Ginsberg and Susanna Aaron",
        "object_date": "1963/2010",
        "object_depth": "",
        "object_height": "",
        "object_width": "",
        "origin_datecreated_end": "1963",
        "origin_datecreated_start": "1963",
        "physical_description_extent": [
          "12 1/2 x 18 1/4"
        ],
        "physical_description_material": [
          "Gelatin silver print"
        ],
        "physical_description_technique": [
          "Gelatin silver print"
        ],
        "pid": "bdr:123456",
        "title": "As Demonstrators"
      }]';

    $jsonDecoded = json_decode($jsondata);
    print_r('<pre>');
    print_r($jsonDecoded);
    print_r('</pre>');
    $fh = fopen('fileout.csv', 'w');
    if (is_array($jsonDecoded)){
      print_r('<-------- line variable output-------->');   
      foreach($jsonDecoded as $line){
            print_r('<pre>'); print_r($line); print_r('</pre>');
        print_r('<-------- data variable output-------->');
        if (is_array($line)||is_object($line)){
          foreach($line as $data){
            fputcsv($fp,$data);
            }
          }
        }
      }
    }

   fclose($fh);
   print_r('Converted Successfully');
?>

我尝试研究了stackoverflow中的大多数类似问题，但是没有一个类似的问题，因此对我没有太大帮助。

如果我使用单个foreach ，则会收到错误消息，表示“数组到字符串的转换失败”，并且将数组作为值而不是实际数据打印到csv文件中。

如果我使用两个foreach我得到错误fputcsv（）期望参数2是给定的数组字符串

解码后的json的var_dump或print_r结果如下

Array
(
[0] => stdClass Object
    (
        [accession_number_original] => 2012.11.45
        [author_birth_date] => Array
            (
                [0] => 1932
            )

        [author_date] => Array
            (
                [0] => 1932
            )

        [author_death_date] => Array
            (
                [0] => 
            )

        [author_description] => Array
            (
                [0] => American
            )

        [author_display] => Array
            (
                [0] => Day yon
            )

        [author_names_first] => Array
            (
                [0] => Day
            )

        [author_names_last] => Array
            (
                [0] => yon
            )

        [author_names_middle] => Array
            (
                [0] => 
            )

        [image_height] => 12 1/2
        [image_width] => 18 1/4
        [jp2_image_url] => 
        [location_physical_location] => Art Gallery
        [location_shelf_locator] => Unknown
        [master_image_url] => 
        [note_provenance] => Gift of Gary Ginsberg and Susanna Aaron
        [object_date] => 1963/2010
        [object_depth] => 
        [object_height] => 
        [object_width] => 
        [origin_datecreated_end] => 1963
        [origin_datecreated_start] => 1963
        [physical_description_extent] => Array
            (
                [0] => 12 1/2 x 18 1/4
            )

        [physical_description_material] => Array
            (
                [0] => Gelatin silver print
            )

        [physical_description_technique] => Array
            (
                [0] => Gelatin silver print
            )

        [pid] => bdr:123456
        [title] => As Demonstrators
    )
)

助力车

正如我在评论中提到的那样，第一步将是处理数组值，因此每一行都需要转换值（它仅以您提供的格式计数，如果存在带有2个值的数组，则只会传递第一个值）到csv）。

您修改的源代码：

$jsonDecoded = json_decode($jsondata, true); // add true, will handle as associative array    
print_r('<pre>');
print_r($jsonDecoded);
print_r('</pre>');
$fh = fopen('fileout.csv', 'w');
if (is_array($jsonDecoded)) {
  print_r('<-------- line variable output-------->');   
  foreach ($jsonDecoded as $line) {
    // with this foreach, if value is array, replace it with first array value
    foreach ($line as $key => $value) {
        if (is_array($value)) {
            $line[$key] = $value[0];
        }
    }
    print_r('<pre>'); print_r($line); print_r('</pre>');
    // no need for foreach, as fputcsv expects array, which we already have
    if (is_array($line)) {
      fputcsv($fh,$line);
    }
  }
}
fclose($fh);
print_r('Converted Successfully');

执行后的脚本输出：

[output of your print_r($jsonDecoded);]

<-------- line variable output-------->

Array
(
    [accession_number_original] => 2012.11.45
    [author_birth_date] => 1932
    [author_date] => 1932
    [author_death_date] => 
    [author_description] => American
    [author_display] => Day yon
    [author_names_first] => Day
    [author_names_last] => yon
    [author_names_middle] => 
    [image_height] => 12 1/2
    [image_width] => 18 1/4
    [jp2_image_url] => 
    [location_physical_location] => Art Gallery
    [location_shelf_locator] => Unknown
    [master_image_url] => 
    [note_provenance] => Gift of Gary Ginsberg and Susanna Aaron
    [object_date] => 1963/2010
    [object_depth] => 
    [object_height] => 
    [object_width] => 
    [origin_datecreated_end] => 1963
    [origin_datecreated_start] => 1963
    [physical_description_extent] => 12 1/2 x 18 1/4
    [physical_description_material] => Gelatin silver print
    [physical_description_technique] => Gelatin silver print
    [pid] => bdr:123456
    [title] => As Demonstrators
)

Converted Successfully

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