Pretty-Printing-JSON mit PHP

Ich baue ein PHP-Skript, das JSON-Daten an ein anderes Skript weitergibt. Mein Skript baut Daten in ein großes assoziatives Array ein und gibt die Daten dann mit aus json_encode. Hier ist ein Beispielskript:

$data = array('a' => 'apple', 'b' => 'banana', 'c' => 'catnip');
header('Content-type: text/javascript');
echo json_encode($data);

Der obige Code ergibt die folgende Ausgabe:

{"a":"apple","b":"banana","c":"catnip"}

Das ist großartig, wenn Sie eine kleine Datenmenge haben, aber ich würde etwas in dieser Richtung bevorzugen:

{
    "a": "apple",
    "b": "banana",
    "c": "catnip"
}

Gibt es eine Möglichkeit, dies in PHP ohne einen hässlichen Hack zu tun? Es scheint, als ob jemand an Facebook herausgefunden.

PHP 5.4 bietet die JSON_PRETTY_PRINT Option zur Verwendung mit der json_encode() Anruf.

http://php.net/manual/en/function.json-encode.php

<?php
...
$json_string = json_encode($data, JSON_PRETTY_PRINT);

Diese Funktion nimmt eine JSON-Zeichenfolge und rückt sie sehr gut lesbar ein. Es sollte auch konvergent sein,

prettyPrint( $json ) === prettyPrint( prettyPrint( $json ) )

Eingang

{"key1":[1,2,3],"key2":"value"}

Ausgabe

{
    "key1": [
        1,
        2,
        3
    ],
    "key2": "value"
}

Code

Funktion prettyPrint( $json ) { $result="";  $level = 0;  $in_quotes = falsch;  $in_escape = falsch;  $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 = falsch;  } else if( $char === '"' ) { $in_quotes = !$in_quotes; } else if( ! $in_quotes ) { 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;
        }
        if( $new_line_level !== NULL ) {
            $result .= "\n".str_repeat( "\t", $new_line_level );
        }
        $result .= $char.$post;
    }

    return $result;
}

Many users suggested that you use

echo json_encode($results, JSON_PRETTY_PRINT);

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.

header('Content-Type: application/json');

This will result in a well formatted output.

Or, if you like extensions you can use JSONView for Chrome.

I realize this question is asking about 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):

$json = json_encode(json_decode($json), JSON_PRETTY_PRINT);

Example:

header('Content-Type: application/json');
$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;

This outputs:

{
    "a": 1,
    "b": 2,
    "c": 3,
    "d": 4,
    "e": 5
}

I had the same issue.

Anyway I just used the json formatting code here:

http://recursive-design.com/blog/2008/03/11/format-json-with-php/

Works well for what I needed it for.

And a more maintained version: https://github.com/GerHobbelt/nicejson-php

Gluing several answers together fit my need for existing json:

Code:
echo "<pre>"; 
echo json_encode(json_decode($json_response), JSON_PRETTY_PRINT); 
echo "</pre>";

Output:
{
    "data": {
        "token_type": "bearer",
        "expires_in": 3628799,
        "scopes": "full_access",
        "created_at": 1540504324
    },
    "errors": []"pagination": {}, "token_type": "bearer", "expires_in": 3628799, "scopes": "full_access", "created_at": 1540504324 }

Ich habe dies verwendet:

echo "<pre>".json_encode($response, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)."</pre>";

Oder verwenden Sie PHP-Header wie folgt:

header('Content-type: application/json; charset=UTF-8');
echo json_encode($response, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);