<?php

$invoice = array(

    'customer_id' => '198938000001208463',

    'contact_persons' => array("198938000001222003"),

    'invoice_number' => 'TEST-00001',

    'reference_number' => '123456',

    'template_id' => '198938000000124001',

    'date' => '2015-11-23',

    'payment_terms' => 0,

    'payment_terms_label' => 'Pagadero a la recepcion',

    'due_date' => '2015-11-28',

    'discount' => '0%',

    'is_discount_before_tax' => true,

    'discount_type' => 'item_level',

    'is_inclusive_tax' => false,

    'exchange_rate' => 0.103627,

    'recurring_invoice_id' => '',

    'invoiced_estimate_id' => '',

    'salesperson_name' => '',

    'custom_fields' => array(),

    'line_items' => array(

        array(

            'item_id'=>'198938000000021015',

            'project_id'=>'',

            'expense_id'=>'',

            'salesorder_item_id'=>'',

            'name'=>'GATE-IN',

            'description'=>'',

            //'item_order'=>0,

            'rate'=>241.25,

            'unit'=>'CONTAINER',

            'quantity'=>2.0,

            'discount'=>'0%',

            'tax_id'=>'198938000000023286'

        )

    ),

    'payment_options' => array('payment_gateways' => array()),

    'allow_partial_payments' => false,

    'custom_body' => '',

    'custom_subject' => '',

    'notes' => 'T.C. $ 9,65',

    'terms' => '',

    'shipping_charge' => 0.0,

    'adjustment' => 0.0,

    'adjustment_description' => 'Ajuste'

);

$jsonInvoice = json_encode($invoice);

$url = 'https://books.zoho.com/api/v3/invoices';

$data = array(

        'authtoken'   => '[Auth Token]',

        'JSONString'   => $jsonInvoice,

        "organization_id"  => '6217732',

        "send"                  => 'false'

);

$ch = curl_init($url);

curl_setopt($ch, CURLOPT_VERBOSE, 1);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); 

curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

curl_setopt($ch, CURLOPT_POST, TRUE);

curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json") );

$response = curl_exec($ch);

curl_close($ch);

var_dump($response);