{"id":1933,"date":"2017-03-23T19:48:05","date_gmt":"2017-03-23T14:18:05","guid":{"rendered":"https:\/\/www.wikitechy.com\/technology\/?p=1933"},"modified":"2017-03-28T17:25:10","modified_gmt":"2017-03-28T11:55:10","slug":"pretty-printing-json-php","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/technology\/pretty-printing-json-php\/","title":{"rendered":"[ Solved – 7 Answers ] PHP – Pretty-Printing JSON with PHP"},"content":{"rendered":"

We build a PHP script that feeds JSON data to another script. \u00a0ur script builds data into a large associative array, and then outputs the data using json_encode.<\/p>\n

Here is an example script:<\/span><\/strong><\/h4>\n
Php Code<\/span> <\/div> 
$data = array('a' => 'apple', 'b' => 'banana', 'c' => 'catnip');header('Content-type: text\/javascript');echo json_encode($data);<\/code><\/pre> <\/div>\n
    \n
  • The above code yields the following output:<\/li>\n<\/ul>\n
     
     Php Code<\/span> <\/div> 
    {"a":"apple","b":"banana","c":"catnip"}<\/code><\/pre> <\/div>\n
      \n
    • This is great if you have a small amount of data, but I’d prefer something along these lines:<\/li>\n<\/ul>\n
       
       Php Code<\/span> <\/div> 
      {    "a": "apple",    "b": "banana",    "c": "catnip"}<\/code><\/pre> <\/div>\n
        \n
      • Is there a way to do this in PHP without an ugly hack? It seems like someone at Facebook figured it out.<\/li>\n
      • php json pretty-print<\/li>\n<\/ul>\n
        PHP 5.4 offers the JSON_PRETTY_PRINT option for use with the json_encode() call.<\/p>\n
        http:\/\/php.net\/manual\/en\/function.json-encode.php<\/p>\n
         
         Php Code<\/span> <\/div> 
        <?php...$json_string = json_encode($data, JSON_PRETTY_PRINT);<\/code><\/pre> <\/div>\n
        This function will take JSON string and indent it very readable. It also should be convergent,<\/p>\n
         
         Php Code<\/span> <\/div> 
        prettyPrint( $json ) === prettyPrint( prettyPrint( $json ) )<\/code><\/pre> <\/div>\n
        Input<\/p>\n
         
         Php Code<\/span> <\/div> 
        {"key1":[1,2,3],"key2":"value"}<\/code><\/pre> <\/div>\n
        Output<\/p>\n
         
         Php Code<\/span> <\/div> 
        {    "key1": [        1,        2,        3    ],    "key2": "value"}<\/code><\/pre> <\/div>\n
        Code:<\/span><\/strong><\/h4>\n
         
         Php Code<\/span> <\/div> 
        function prettyPrint( $json ){    $result = '';    $level = 0;    $in_quotes = false;    $in_escape = false;    $ends_line_level = NULL;    $json_length = strlen( $json );    for( $i = 0; $i < $json_length; $i++ ) {        $char = $json[$i];        $new_line_level = NULL;        $post = "";        if( $ends_line_level !== NULL ) {            $new_line_level = $ends_line_level;            $ends_line_level = NULL;        }        if ( $in_escape ) {            $in_escape = false;        } else if( $char === '"' ) {            $in_quotes = !$in_quotes;        } else if( ! $in_quotes ) {<\/code><\/pre> <\/div>\n
         
         Php Code<\/span> <\/div> 
        switch( $char ) {                case '}': case ']':                    $level--;                    $ends_line_level = NULL;                    $new_line_level = $level;                    break;                case '{': case '[':                    $level++;                case ',':                    $ends_line_level = $level;                    break;                case ':':                    $post = " ";                    break;                case " ": case "\\t": case "\\n": case "\\r":                    $char = "";                    $ends_line_level = $new_line_level;                    $new_line_level = NULL;                    break;            }        } else if ( $char === '\\\\' ) {            $in_escape = true;<\/code><\/pre> <\/div>\n
         
         Php Code<\/span> <\/div> 
         }        if( $new_line_level !== NULL ) {            $result .= "\\n".str_repeat( "\\t", $new_line_level );        }        $result .= $char.$post;    }    return $result;}<\/code><\/pre> <\/div>\n[ad type=”banner”]\n
        We just used the json formatting code here:<\/span><\/strong><\/h4>\n
        http:\/\/recursive-design.com\/blog\/2008\/03\/11\/format-json-with-php\/<\/p>\n
         
         Php Code<\/span> <\/div> 
        echo json_encode($results, JSON_PRETTY_PRINT);<\/code><\/pre> <\/div>\n
        Which is absolutely right. But it’s not enough, the browser needs to understand the type of data, you can specify the header just before echo-ing the data back to the user.<\/p>\n
         
         Php Code<\/span> <\/div> 
        header('Content-Type: application\/json');<\/code><\/pre> <\/div>\n
          \n
        • This will result in a well formatted output.<\/li>\n
        • Or, if you like extensions you can use JSONView for Chrome.<\/li>\n<\/ul>\n
          Simple way for php>5.4:<\/span><\/strong><\/h4>\n
           
           Php Code<\/span> <\/div> 
          $Data = array('a' => 'apple', 'b' => 'banana', 'c' => 'catnip');$json= json_encode($Data, JSON_PRETTY_PRINT);header('Content-Type: application\/json');print_r($json);<\/code><\/pre> <\/div>\n
          Result in browser<\/p>\n
           
           Php Code<\/span> <\/div> 
          {    "a": "apple",    "b": "banana",    "c": "catnip"}<\/code><\/pre> <\/div>\n[ad type=”banner”]\n
          How to encode an associative array to a pretty-formatted JSON string, so this doesn’t directly answer the question, but if you have a string that is already in JSON format, you can make it pretty simply by decoding and re-encoding it (requires PHP >= 5.4):<\/p>\n
           
           Php Code<\/span> <\/div> 
          $json = json_encode(json_decode($json), JSON_PRETTY_PRINT);<\/code><\/pre> <\/div>\n
          Example:<\/span><\/h4>\n
           
           Php Code<\/span> <\/div> 
          $json_ugly = '{"a":1,"b":2,"c":3,"d":4,"e":5}';$json_pretty = json_encode(json_decode($json_ugly), JSON_PRETTY_PRINT);echo $json_pretty;<\/code><\/pre> <\/div>\n
          This outputs:<\/strong><\/span><\/h4>\n
           
           Php Code<\/span> <\/div> 
          {    "a": 1,    "b": 2,    "c": 3,    "d": 4,    "e": 5}<\/code><\/pre> <\/div>\n
          Use <pre> in combination with json_encode() and the JSON_PRETTY_PRINT option:<\/span><\/h4>\n
           
           Php Code<\/span> <\/div> 
          <pre>    <?php    echo json_encode($dataArray, JSON_PRETTY_PRINT);    ?><\/pre><\/code><\/pre> <\/div>\n[ad type=”banner”]\n","protected":false},"excerpt":{"rendered":"
          PROBLEM : We build a PHP script that feeds JSON data to another script. \u00a0ur script builds data into a large associative array, and then outputs the data using json_encode. Here is an example script: The above code yields the following output: This is great if you have a small amount of data, but I’d […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[4180,4173,4172,4178,4174,4179,4176,4175,4177,3885],"class_list":["post-1933","post","type-post","status-publish","format-standard","hentry","category-php","tag-alternative-layout-for-pretty-printed-json-string-structure","tag-can-comments-be-used-in-json","tag-how-can-i-pretty-format-my-json-output-in-ruby-on-rails","tag-how-can-i-pretty-print-json-using-javascript","tag-how-can-i-pretty-print-json","tag-how-to-log-pretty-printed-json-in-php","tag-is-there-a-pretty-print-for-php","tag-pretty-printing-xml-in-python","tag-pretty-print-json-in-java","tag-what-is-the-correct-json-content-type"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/1933","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=1933"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/1933\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=1933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=1933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=1933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}