firebase.php

<?php
// set your database path
$firebase = 'https://myrealtimedb.firebaseio.com/';

// Update or Save to fireBase 
$data = FireBaseJson('PUT','MyContentPath', 'MyContentData');
print_r($data);

// Get from fireBase 
$data = FireBaseJson('GET', 'MyContentPath');
print_r($data);

// Delete from firebase 
//$data = FireBaseJson('DELETE', 'MyContentPath');
//print_r($data);

function FireBaseJson($action, $path, $data='') {
    global $firebase;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $firebase.$path.'.json');
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, strtoupper($action));
    if(strtoupper($action) == 'POST' || strtoupper($action) == 'PUT' || strtoupper($action) == 'PATCH') {
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    }
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    $response = curl_exec($ch);
    curl_close($ch);
    return json_decode($response);
}
?>