The Google Jsonnet for PHP
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README.md

jsonnet

The Google Jsonnet for PHP

Google Jsonnet Tutorial

Jsonnet language, from its most basic features to its powerful object model, punctuated with examples drawn from the world of cocktails. These examples are meant to be fun, and although a little contrived, do not restrict our thinking to any one particular application of Jsonnet.

Caveat: Note that Jsonnet unparses JSON in a simple way. In particular, it alphabetically reorders object fields in its output. This is natural and compatible with JSON, since if order is meaningful, an array of pairs should be used instead of an object. Also, unparsing JSON using a canonical ordering of field names makes it possible to use diff to compare outputs. However, the example output on this page has been manually re-ordered in order to allow easier visual comparison to the given input. The whitespace of the output has also been tweaked to make it fit more neatly on the page. So, if you run these examples yourself, the output might be different (but equivalent).

For more information on Jsonnet, please see:

Install Jsonnet for PHP

The pecl package is: http://pecl.php.net/package/jsonnet

To install Jsonnet, run:

pecl install jsonnet

or:

wget -O Jsonnet.Latest.tar.gz https://pecl.php.net/get/jsonnet
mkdir Jsonnet-PHP && tar -xzvf Jsonnet.Latest.tar.gz -C ./Jsonnet-PHP
cd Jsonnet-PHP/Jsonnet-1.0.0

phpize
./configure
make && make install

Simple Syntax Improvements

Input (Jsonnet)

{
    cocktails: {
        // Ingredient quantities are in fluid ounces.
        "Tom Collins": {
            ingredients: [
                { kind: "Farmers Gin", qty: 1.5 },
                { kind: "Lemon", qty: 1 },
                { kind: "Simple Syrup", qty: 0.5 },
                { kind: "Soda", qty: 2 },
                { kind: "Angostura", qty: "dash" },
            ],
            garnish: "Maraschino Cherry",
            served: "Tall",
        },
        Manhattan: {
            ingredients: [
                { kind: "Rye", qty: 2.5 },
                { kind: "Sweet Red Vermouth", qty: 1 },
                { kind: "Angostura", qty: "dash" },
            ],
            garnish: "Maraschino Cherry",
            served: "Straight Up",
        },
    }
}

Output (JSON)

{
    "cocktails": {

        "Tom Collins": {
            "ingredients": [
                { "kind": "Farmers Gin", "qty": 1.5 },
                { "kind": "Lemon", "qty": 1 },
                { "kind": "Simple Syrup", "qty": 0.5 },
                { "kind": "Soda", "qty": 2 },
                { "kind": "Angostura", "qty": "dash" }
            ],
            "garnish": "Maraschino Cherry",
            "served": "Tall"
        },
        "Manhattan": {
            "ingredients": [
                { "kind": "Rye", "qty": 2.5 },
                { "kind": "Sweet Red Vermouth", "qty": 1 },
                { "kind": "Angostura", "qty": "dash" }
            ],
            "garnish": "Maraschino Cherry",
            "served": "Straight Up"
        }
    }
}

Demo of PHP

Jsonnet::evaluateFile('bar_menu.1.jsonnet');

$Snippet = '
{
    cocktails: {
        // Ingredient quantities are in fluid ounces.
        "Tom Collins": {
            ingredients: [
                { kind: "Farmers Gin", qty: 1.5 },
                { kind: "Lemon", qty: 1 },
                { kind: "Simple Syrup", qty: 0.5 },
                { kind: "Soda", qty: 2 },
                { kind: "Angostura", qty: "dash" },
            ],
            garnish: "Maraschino Cherry",
            served: "Tall",
        },
        Manhattan: {
            ingredients: [
                { kind: "Rye", qty: 2.5 },
                { kind: "Sweet Red Vermouth", qty: 1 },
                { kind: "Angostura", qty: "dash" },
            ],
            garnish: "Maraschino Cherry",
            served: "Straight Up",
        },
    }
}
';

var_dump(Jsonnet::evaluateSnippet($Snippet));

PHP Re Result

/usr/local/php/php-7.0.6-zts-debug/bin/php --re jsonnet

Extension [ <persistent> extension #40 Jsonnet version v1.3.1 ] {

  - Constants [2] {
    Constant [ string JSONNET_PHP_VERSION ] { v1.3.1 }
    Constant [ string JSONNET_PHP_AUTHOR ] { Chitao.Gao  [ neeke@php.net ] }
  }

  - Functions {
    Function [ <internal:Jsonnet> function jsonnet_get_version ] {
    }
    Function [ <internal:Jsonnet> function jsonnet_get_author ] {
    }
  }

  - Classes [1] {
    Class [ <internal:Jsonnet> class Jsonnet ] {

      - Constants [0] {
      }

      - Static properties [0] {
      }

      - Static methods [4] {
        Method [ <internal:Jsonnet> static public method evaluateFile ] {

          - Parameters [1] {
            Parameter #0 [ <required> $file_path ]
          }
        }

        Method [ <internal:Jsonnet> static public method evaluateSnippet ] {

          - Parameters [1] {
            Parameter #0 [ <required> $snippet_string ]
          }
        }

        Method [ <internal:Jsonnet> static public method fmtFile ] {

          - Parameters [1] {
            Parameter #0 [ <required> $file_path ]
          }
        }

        Method [ <internal:Jsonnet> static public method fmtSnippet ] {

          - Parameters [1] {
            Parameter #0 [ <required> $snippet_string ]
          }
        }
      }

      - Properties [0] {
      }

      - Methods [2] {
        Method [ <internal:Jsonnet, ctor> public method __construct ] {
        }

        Method [ <internal:Jsonnet, dtor> public method __destruct ] {
        }
      }
    }
  }
}

CodeTips

<?php
/**
 * @author neeke@php.net
 * Date: 18/3/29 下午7:51
 */

const JSONNET_PHP_VERSION = 'v1.3.0';
const JSONNET_PHP_AUTHOR  = 'neeke@php.net';

const CODE_SUCCESS = 1000;
const CODE_ERROR   = 900;

/**
 * @return string
 */
function jsonnet_get_version()
{
    return JSONNET_PHP_VERSION;
}

function jsonnet_get_author()
{
    return JSONNET_PHP_AUTHOR;
}

class Jsonnet
{
    public function __construct()
    {
        #Jsonnet init
    }

    public function __destruct()
    {
        #Jsonnet destroy
    }

    /**
     * @param $file_path
     *
     * @return array
     * @throws Exception
     */
    static public function evaluateFile($file_path)
    {
        throw new Exception('Jsonnet::evaluateFile #error', CODE_ERROR);

        return array();
    }

    /**
     * @param $snippet_string
     *
     * @return array
     * @throws Exception
     */
    static public function evaluateSnippet($snippet_string)
    {
        throw new Exception('Jsonnet::evaluateSnippet #error', CODE_ERROR);

        return array();
    }

    /**
     * @param $file_path
     *
     * @return array
     * @throws Exception
     */
    static public function fmtFile($file_path)
    {
        throw new Exception('Jsonnet::fmtFile #error', CODE_ERROR);

        return array();
    }

    /**
     * @param $snippet_string
     *
     * @return array
     * @throws Exception
     */
    static public function fmtSnippet($snippet_string)
    {
        throw new Exception('Jsonnet::fmtSnippet #error', CODE_ERROR);

        return array();
    }

}