Simple Arrray Map PHP

sandiJson.php

<?php

/**
 * saya memiliki contoh JSON dalam bentuk string
 */

$stringJson = '{"message":[{"id":"23","description":"AXIS 5000","code":"AX5","code_alias":"AH5","substitute":"1","price":"5419","profit_max":"160","h2h":"5419","h2h_lock":"0","h2h_max":"100","price_host":"5319","nominal":"5000","operator":"AXIS","operator_sub":"AX","supplier":"lumbung","publish":"1","status":"normal","block":"0","date_update":"2016-01-26 13:35:02","provider":"AXIS","provider_sub":"REGULER"},{"id":"28","description":"AXIS 10000","code":"AX10","code_alias":"AH10","substitute":"1","price":"10419","profit_max":"160","h2h":"10419","h2h_lock":"0","h2h_max":"100","price_host":"10319","nominal":"10000","operator":"AXIS","operator_sub":"AX","supplier":"lumbung","publish":"1","status":"normal","block":"0","date_update":"2016-02-09 07:20:02","provider":"AXIS","provider_sub":"REGULER"}]}';

/**
 * Disini Saya merubah dari format string Json ke
 * PHP Object Menggunakan fungsi json_decode
 */

$dataToObject = json_decode($stringJson);

/**
 * Saaya Deklarasi Anonymous Function untuk 
 * Membuat Array baru yang hanya berisi Nilai dari 
 * ID
 */
$filterID = function($x){
  return $x->id;
};

/**
 * Disini Proses Filter atau pengambilan dari variable yang
 * yang sudah menampung object dari json string
 * dengan menggunakan fungsi anonymous diatas
 * di kerjakan oleh fungsi array_map
 * di tampung di $dataToIdOnly
 */
$dataToIdOnly = array_map($filterID, $dataToObject->message);

echo json_encode($dataToIdOnly);