README.md

JsonPath

JsonPath utility (XPath for JSON) for PHP based on Stefan Goessner's implementation : http://code.google.com/p/jsonpath/

C php extension is in progress here, any help is welcome :)

Documentation

What is JsonPath ? What is the syntax ? Take a look to Stefan Goessner's documentation

Installation

• That's simple ! Add this to your composer.json :

    "require": {
        "peekmo/jsonpath": "dev-master"
    }

You just have to require the vendor/autoload.php (if not already) and add the following use :

    use Peekmo\JsonPath\JsonStore;

How it works ?

/!\ API Breaking Changes with new version !

Consider this json :

{ 
    "store": {
        "book": [ 
            { 
                "category": "reference",
                "author": "Nigel Rees",
                "title": "Sayings of the Century",
                "price": 8.95
            },
            { 
                "category": "fiction",
                "author": "Evelyn Waugh",
                "title": "Sword of Honour",
                "price": 12.99
            },
            {  
                "category": "fiction",
                "author": "Herman Melville",
                "title": "Moby Dick",
                "isbn": "0-553-21311-3",
                "price": 8.99
            },
            {   
                "category": "fiction",
                "author": "J. R. R. Tolkien",
                "title": "The Lord of the Rings",
                "isbn": "0-395-19395-8",
                "price": 22.99
            }
        ],
        "bicycle": {
            "color": "red",
            "price": 19.95
        }
    }
}

• Transform your json into array (it works with object, but use an array for better performances)
• You can get values like this :

    <?php
    
    require_once __DIR__ . '/vendor/autoload.php'; // Autoload files using Composer autoload

    use Peekmo\JsonPath\JsonStore;

    $json = '...';

    $store = new JsonStore($json);

    // Returns an array with all categories from books which have an isbn attribute
    $res = $store->get("$..book[?(@.isbn)].category");
    
    $res = $store->get("$..book[?(@.isbn)].category", true); // You can set true to get only unique results

    ?>

It returns an array, you can so use default functions on the result (Have unique key for example) From 1.1.0, it returns an empty array if the node does not exists

• You can change a value like this :

    <?php
    
    require_once __DIR__ . '/vendor/autoload.php'; // Autoload files using Composer autoload

    use Peekmo\JsonPath\JsonStore;

    $json = '...';

    $store = new JsonStore($json);

    // Change the value of the first book's category
    $store->set("$..book[0].category", "superCategory");

    echo $store->toString();

    ?>

The value is passed by reference, so, when you are using a set, your object "$o" is modified. It returns a boolean to know if the node has been modified or not

• You can add a value like this :

    <?php
    
    require_once __DIR__ . '/vendor/autoload.php'; // Autoload files using Composer autoload

    use Peekmo\JsonPath\JsonStore;

    $json = '...';

    $store = new JsonStore($json);

    // Add a new value in first book's array "key":"value"
    $store->add("$..book[0]", "value", "key");

    echo $store->toString();

    ?>

The parameter "key" is optional, a number will be set if you're not providing one. It returns a boolean to know if the node has been modified or not

• You can remove an attribute like this :

    <?php
    
    require_once __DIR__ . '/vendor/autoload.php'; // Autoload files using Composer autoload

    use Peekmo\JsonPath\JsonStore;

    $json = '...';

    $store = new JsonStore($json);

    // Removes the attribute "category" from all books
    $store->remove("$..book.*.category");

    echo $store->toString();

    ?>

Thanks

• Special thanks to Stefan Goessner for his previous work