sergoslav/graphql-php

Easy build GraphQL mutation or query in PHP

Build a Mutation/Query from php-array

This library can build a ready to use query/mutation string from php array

Installation

composer require adeey/graphql-php

Classes

<?php

require 'vendor/autoload.php';

use MaxGraphQL\Types\Query; // For Query
use MaxGraphQL\Types\Mutation; // For Mutation

Steps to use

Steps to use:

1. Create new class object $mutation = new Mutation('name'); with mutation/query name

2. Add what you want to select $mutation->addSelect(['test', 'name']);

   2.1 Or you can pass a one name of field

    $mutation->addSelect('name');
    $mutation->addSelect('test');
    $mutation->getSelect(); // ['name', 'test']

3. Add arguments(filters) to your query $mutation->addArguments(['test' => 123]);

4. Get the builded query $mutation->getPreparedQuery();

5. Use the string in your request

OR

You can build string by calling static method:

// $arguments is optional
Mutation::getPreparedQueryFrom('nameOfYourMutation', $selected, $arguments);
Query::getPreparedQueryFrom('nameOfYourQuery', $selected, $arguments);

both of these methods will return string

Methods

Methods that can be called from object

1. To return current selected fields $object->getSelect()
2. To return current arguments $object->getArguments()

Where is arguments/select?

query {
    HEREYOURNAME( argument: "ITS MY ARGUMENT" ) {
        HERE SELECT
    }
}

php code of example:

$query = new Query('HEREYOURNAME');
$arguments = [
    'argument' => 'ITS MY ARGUMENT'
];
$select = [
    'HERE SELECT'
];
$query->addSelect($select);
$query->addArguments($arguments);
$query->getPreparedQuery(); // and here ours query

How to build a query like this? Its pretty easy

query {
    users(
        format: ALL,
        filter: {
            activeUsers: true,
            userIds: [1,2]
        }
    ) {
        id
        name
        code
        password
        channels {
            id
            titles {
                id
            }
        }
        ... on UserAdmin {
            userAdminLevel
        }
    }
}

PHP code:

$whatIWantToSelect = [
    'id',
    'name',
    'code',
    'password',
    'channels' => [
        'id',
        'titles' => [
            'id'
        ]
    ],
    '... on UserAdmin' => [
        'userAdminLevel'
    ]       
];

$filteringArguments = [
    'format' => 'ALL', // if you want write enum values you need to write it uppercase
    'filter' => [
        'activeUsers' => true,
        'userIds' => [1,2]
    ]
];

$query = new Query('users');
$query->addSelect($whatIWantToSelect);
$query->addArguments($filteringArguments);
echo $query->getPreparedQuery(); // returns query string

The result of PHP code is string of query that equals my GraphQL query and its generated from PHP arrays:

query{users(format:ALL,filter:{activeUsers:true,userIds:[1,2]}){id,name,code,password,channels{id,titles{id}},... on UserAdmin{userAdminLevel}}}

How to build a mutation like this?

mutation {
    updateUser(
        id: "321",
        data: {
            name: "Test",
            age: 32,
            admin: false
        }
    ) {
        id
        name
        code
        password
        channels {
            id
            titles {
                id
            }
        }
        ... on UserAdmin {
            userAdminLevel
        }
    }
}

PHP code:

$whatIWantToSelect = [
    'id',
    'name',
    'code',
    'password',
    'channels' => [
        'id',
        'titles' => [
            'id'
        ]
    ],
    '... on UserAdmin' => [
        'userAdminLevel'
    ]       
];

$mutationArguments = [
    'id' => '321', // look that id is in string format
    'data' => [
        'name' => "Test",
        'age' => 32, // and the age is int
        'admin' => false
    ]
];

$mutation = new Mutation('updateUser'); // updateUser - name of mutation
$mutation->addSelect($whatIWantToSelect);
$mutation->addArguments($mutationArguments);

echo $mutation->getPreparedQuery(); // returns mutation string

Result mutation in string

mutation{updateUser(id:"321",data:{name:"Test",age:32,admin:false}){id,name,code,password,channels{id,titles{id}},... on UserAdmin{userAdminLevel}}}

Additional cases:

Sometimes we want to add extra filter to query like this:

query {
    users {
        all(pageSize: 25) {
            name
            ...
        }
    }
}

We need to write like that:

$whatWeNeedToSelect = [
    'all(pageSize: 25)' => [
        'name',
        ...    
    ]
];