node.php

<?php
$node;
	function checknode($x){
		$data = '{"jsonrpc": "2.0", "method": "get_accounts", "params": [["mahdiyari"]], "id": 1}';
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $x);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
		$result = curl_exec($ch);
		if($result == false || $result == null || $result == ''){
			return 0;
		}else{
			return 1;
		}
		curl_close($ch);
	}
	function setknode($x){
		$GLOBALS['node'] = $x;
		return 1;
	}
	if(checknode('https://rpc.buildteam.io/')){
		setknode('https://rpc.buildteam.io/');
	}elseif(checknode('https://steemd.steemit.com/')){
		setknode('https://steemd.steemit.com/');
	}elseif(checknode('https://gtg.steem.house:8090/')){
		setknode('https://gtg.steem.house:8090/');
	}else{
		die('Nodes Down.');
	}
?>