Merge pull request #10 from jaggedsoft/master

Add error messages

README.md

@@ -2,7 +2,7 @@
 [![Packagist Downloads](https://img.shields.io/packagist/dt/jaggedsoft/php-binance-api.svg)](https://packagist.org/packages/jaggedsoft/php-binance-api)
 
 # PHP Binance API
-This project is designed to help you make your own projects that interact with the [Binance API](https://www.binance.com/restapipub.html). You can stream candlestick chart data, market depth, or use other advanced features such as setting stop losses and iceberg orders. This project seeks to have complete API coverage including WebSockets.
+This project is designed to help you make your own projects that interact with the [Binance API](https://github.com/binance-exchange/binance-official-api-docs). You can stream candlestick chart data, market depth, or use other advanced features such as setting stop losses and iceberg orders. This project seeks to have complete API coverage including WebSockets.
 
 #### Installation
 ```

php-binance-api.php

@@ -106,7 +106,12 @@ private function request($url, $params = [], $method = "GET") {
 		];
 		$context = stream_context_create($opt);
 		$query = http_build_query($params, '', '&');
-		return json_decode(file_get_contents($this->base.$url.'?'.$query, false, $context), true);
+		try {
+			$data = file_get_contents($this->base.$url.'?'.$query, false, $context);
+		} catch ( Exception $e ) {
+			return ["error"=>$e->getMessage()];
+		}
+		return json_decode($data, true);
 	}
 
 	private function signedRequest($url, $params = [], $method = "GET") {
@@ -129,8 +134,16 @@ private function signedRequest($url, $params = [], $method = "GET") {
 		$query = http_build_query($params, '', '&');
 		$signature = hash_hmac('sha256', $query, $this->api_secret);
 		$endpoint = $base.$url.'?'.$query.'&signature='.$signature;
-		$data = file_get_contents($endpoint, false, $context);
-		return json_decode($data, true);
+		try {
+			$data = file_get_contents($endpoint, false, $context);
+		} catch ( Exception $e ) {
+			return ["error"=>$e->getMessage()];
+		}
+		$json = json_decode($data, true);
+		if ( isset($json['msg']) ) {
+			echo "signedRequest error: {$data}".PHP_EOL;
+		}
+		return $json;
 	}
 
 	private function apiRequest($url, $method = "GET") {
@@ -143,7 +156,12 @@ private function apiRequest($url, $method = "GET") {
 			]
 		];
 		$context = stream_context_create($opt);
-		return json_decode(file_get_contents($this->base.$url, false, $context), true);
+		try {
+			$data = file_get_contents($this->base.$url, false, $context);
+		} catch ( Exception $e ) {
+			return ["error"=>$e->getMessage()];
+		}
+		return json_decode($data, true);
 	}
 
 	public function order($side, $symbol, $quantity, $price, $type = "LIMIT", $flags = []) {
@@ -178,6 +196,10 @@ public function candlesticks($symbol, $interval = "5m") {
 	private function balanceData($array, $priceData = false) {
 		if ( $priceData ) $btc_value = $btc_total = 0.00;
 		$balances = [];
+		if ( empty($array) || empty($array['balances']) ) {
+			echo "balanceData error: Please make sure your system time is synchronized, or pass the useServerTime option.".PHP_EOL;
+			return [];
+		}
 		foreach ( $array['balances'] as $obj ) {
 			$asset = $obj['asset'];
 			$balances[$asset] = ["available"=>$obj['free'], "onOrder"=>$obj['locked'], "btcValue"=>0.00000000, "btcTotal"=>0.00000000];