CCXT for PHP

A comprehensive guide to using CCXT in PHP projects for cryptocurrency exchange integration.

Installation

Via Composer (REST and WebSocket)

composer require ccxt/ccxt

Required PHP Extensions

• cURL
• mbstring (UTF-8)
• PCRE
• iconv
• gmp (for some exchanges)

Optional for Async/WebSocket

• ReactPHP (installed automatically with ccxt)

Quick Start

REST API - Synchronous

<?php
date_default_timezone_set('UTC');  // Required!
require_once 'vendor/autoload.php';

$exchange = new \ccxt\binance();
$exchange->load_markets();
$ticker = $exchange->fetch_ticker('BTC/USDT');
print_r($ticker);

REST API - Asynchronous (ReactPHP)

<?php
use function React\Async\await;

date_default_timezone_set('UTC');
require_once 'vendor/autoload.php';

$exchange = new \ccxt\async\binance();
$ticker = await($exchange->fetch_ticker('BTC/USDT'));
print_r($ticker);

WebSocket API - Real-time Updates

<?php
use function React\Async\await;
use function React\Async\async;

date_default_timezone_set('UTC');
require_once 'vendor/autoload.php';

$exchange = new \ccxt\pro\binance();

while (true) {
    $ticker = await($exchange->watch_ticker('BTC/USDT'));
    print_r($ticker);  // Live updates!
}

await($exchange->close());

REST vs WebSocket

\ccxt\binance()

\ccxt\async\binance()

\ccxt\pro\binance()

fetch_*

watch_*

Creating Exchange Instance

REST API - Synchronous

<?php
date_default_timezone_set('UTC');
require_once 'vendor/autoload.php';

// Public API (no authentication)
$exchange = new \ccxt\binance([
    'enableRateLimit' => true  // Recommended!
]);

// Private API (with authentication)
$exchange = new \ccxt\binance([
    'apiKey' => 'YOUR_API_KEY',
    'secret' => 'YOUR_SECRET',
    'enableRateLimit' => true
]);

REST API - Asynchronous

<?php
use function React\Async\await;

$exchange = new \ccxt\async\binance([
    'enableRateLimit' => true
]);

$ticker = await($exchange->fetch_ticker('BTC/USDT'));

WebSocket API

<?php
use function React\Async\await;

// Public WebSocket
$exchange = new \ccxt\pro\binance();

// Private WebSocket (with authentication)
$exchange = new \ccxt\pro\binance([
    'apiKey' => 'YOUR_API_KEY',
    'secret' => 'YOUR_SECRET'
]);

// Always close when done
await($exchange->close());

Common REST Operations

Loading Markets

// Load all available trading pairs
$exchange->load_markets();

// Access market information
$btc_market = $exchange->market('BTC/USDT');
print_r($btc_market['limits']['amount']['min']);  // Minimum order amount

Fetching Ticker

// Single ticker
$ticker = $exchange->fetch_ticker('BTC/USDT');
print_r($ticker['last']);      // Last price
print_r($ticker['bid']);       // Best bid
print_r($ticker['ask']);       // Best ask
print_r($ticker['volume']);    // 24h volume

// Multiple tickers (if supported)
$tickers = $exchange->fetch_tickers(['BTC/USDT', 'ETH/USDT']);

Fetching Order Book

// Full orderbook
$orderbook = $exchange->fetch_order_book('BTC/USDT');
print_r($orderbook['bids'][0]);  // [price, amount]
print_r($orderbook['asks'][0]);  // [price, amount]

// Limited depth
$orderbook = $exchange->fetch_order_book('BTC/USDT', 5);  // Top 5 levels

Creating Orders

Limit Order

// Buy limit order
$order = $exchange->create_limit_buy_order('BTC/USDT', 0.01, 50000);
print_r($order['id']);

// Sell limit order
$order = $exchange->create_limit_sell_order('BTC/USDT', 0.01, 60000);

// Generic limit order
$order = $exchange->create_order('BTC/USDT', 'limit', 'buy', 0.01, 50000);

Market Order

// Buy market order
$order = $exchange->create_market_buy_order('BTC/USDT', 0.01);

// Sell market order
$order = $exchange->create_market_sell_order('BTC/USDT', 0.01);

// Generic market order
$order = $exchange->create_order('BTC/USDT', 'market', 'sell', 0.01);

Fetching Balance

$balance = $exchange->fetch_balance();
print_r($balance['BTC']['free']);   // Available balance
print_r($balance['BTC']['used']);   // Balance in orders
print_r($balance['BTC']['total']);  // Total balance

Fetching Orders

// Open orders
$open_orders = $exchange->fetch_open_orders('BTC/USDT');

// Closed orders
$closed_orders = $exchange->fetch_closed_orders('BTC/USDT');

// All orders (open + closed)
$all_orders = $exchange->fetch_orders('BTC/USDT');

// Single order by ID
$order = $exchange->fetch_order($order_id, 'BTC/USDT');

Fetching Trades

// Recent public trades
$trades = $exchange->fetch_trades('BTC/USDT', null, 10);

// Your trades (requires authentication)
$my_trades = $exchange->fetch_my_trades('BTC/USDT');

Canceling Orders

// Cancel single order
$exchange->cancel_order($order_id, 'BTC/USDT');

// Cancel all orders for a symbol
$exchange->cancel_all_orders('BTC/USDT');

WebSocket Operations (Real-time)

Watching Ticker (Live Price Updates)

<?php
use function React\Async\await;

$exchange = new \ccxt\pro\binance();

while (true) {
    $ticker = await($exchange->watch_ticker('BTC/USDT'));
    print_r($ticker['last']);
}

await($exchange->close());

Watching Order Book (Live Depth Updates)

<?php
use function React\Async\await;

$exchange = new \ccxt\pro\binance();

while (true) {
    $orderbook = await($exchange->watch_order_book('BTC/USDT'));
    print_r('Best bid: ' . $orderbook['bids'][0][0]);
    print_r('Best ask: ' . $orderbook['asks'][0][0]);
}

await($exchange->close());

Watching Trades (Live Trade Stream)

<?php
use function React\Async\await;

$exchange = new \ccxt\pro\binance();

while (true) {
    $trades = await($exchange->watch_trades('BTC/USDT'));
    foreach ($trades as $trade) {
        print_r($trade['price'] . ' ' . $trade['amount'] . ' ' . $trade['side']);
    }
}

await($exchange->close());

Watching Your Orders (Live Order Updates)

<?php
use function React\Async\await;

$exchange = new \ccxt\pro\binance([
    'apiKey' => 'YOUR_API_KEY',
    'secret' => 'YOUR_SECRET'
]);

while (true) {
    $orders = await($exchange->watch_orders('BTC/USDT'));
    foreach ($orders as $order) {
        print_r($order['id'] . ' ' . $order['status'] . ' ' . $order['filled']);
    }
}

await($exchange->close());

Watching Balance (Live Balance Updates)

<?php
use function React\Async\await;

$exchange = new \ccxt\pro\binance([
    'apiKey' => 'YOUR_API_KEY',
    'secret' => 'YOUR_SECRET'
]);

while (true) {
    $balance = await($exchange->watch_balance());
    print_r('BTC: ' . $balance['BTC']['total']);
}

await($exchange->close());

Complete Method Reference

Market Data Methods

Tickers & Prices

• fetchTicker(symbol)

  - Fetch ticker for one symbol

• fetchTickers([symbols])

  - Fetch multiple tickers at once

• fetchBidsAsks([symbols])

  - Fetch best bid/ask for multiple symbols

• fetchLastPrices([symbols])

  - Fetch last prices

• fetchMarkPrices([symbols])

  - Fetch mark prices (derivatives)

Order Books

• fetchOrderBook(symbol, limit)

  - Fetch order book

• fetchOrderBooks([symbols])

  - Fetch multiple order books

• fetchL2OrderBook(symbol)

  - Fetch level 2 order book

• fetchL3OrderBook(symbol)

  - Fetch level 3 order book (if supported)

Trades

• fetchTrades(symbol, since, limit)

  - Fetch public trades

• fetchMyTrades(symbol, since, limit)

  - Fetch your trades (auth required)

• fetchOrderTrades(orderId, symbol)

  - Fetch trades for specific order

OHLCV (Candlesticks)

• fetchOHLCV(symbol, timeframe, since, limit)

  - Fetch candlestick data

• fetchIndexOHLCV(symbol, timeframe)

  - Fetch index price OHLCV

• fetchMarkOHLCV(symbol, timeframe)

  - Fetch mark price OHLCV

• fetchPremiumIndexOHLCV(symbol, timeframe)

  - Fetch premium index OHLCV

Account & Balance

• fetchBalance()

  - Fetch account balance (auth required)

• fetchAccounts()

  - Fetch sub-accounts

• fetchLedger(code, since, limit)

  - Fetch ledger history

• fetchLedgerEntry(id, code)

  - Fetch specific ledger entry

• fetchTransactions(code, since, limit)

  - Fetch transactions

• fetchDeposits(code, since, limit)

  - Fetch deposit history

• fetchWithdrawals(code, since, limit)

  - Fetch withdrawal history

• fetchDepositsWithdrawals(code, since, limit)

  - Fetch both deposits and withdrawals

Trading Methods

Creating Orders

• createOrder(symbol, type, side, amount, price, params)

  - Create order (generic)

• createLimitOrder(symbol, side, amount, price)

  - Create limit order

• createMarketOrder(symbol, side, amount)

  - Create market order

• createLimitBuyOrder(symbol, amount, price)

  - Buy limit order

• createLimitSellOrder(symbol, amount, price)

  - Sell limit order

• createMarketBuyOrder(symbol, amount)

  - Buy market order

• createMarketSellOrder(symbol, amount)

  - Sell market order

• createMarketBuyOrderWithCost(symbol, cost)

  - Buy with specific cost

• createStopLimitOrder(symbol, side, amount, price, stopPrice)

  - Stop-limit order

• createStopMarketOrder(symbol, side, amount, stopPrice)

  - Stop-market order

• createStopLossOrder(symbol, side, amount, stopPrice)

  - Stop-loss order

• createTakeProfitOrder(symbol, side, amount, takeProfitPrice)

  - Take-profit order

• createTrailingAmountOrder(symbol, side, amount, trailingAmount)

  - Trailing stop

• createTrailingPercentOrder(symbol, side, amount, trailingPercent)

  - Trailing stop %

• createTriggerOrder(symbol, side, amount, triggerPrice)

  - Trigger order

• createPostOnlyOrder(symbol, side, amount, price)

  - Post-only order

• createReduceOnlyOrder(symbol, side, amount, price)

  - Reduce-only order

• createOrders([orders])

  - Create multiple orders at once

• createOrderWithTakeProfitAndStopLoss(symbol, type, side, amount, price, tpPrice, slPrice)

  - OCO order

Managing Orders

• fetchOrder(orderId, symbol)

  - Fetch single order

• fetchOrders(symbol, since, limit)

  - Fetch all orders

• fetchOpenOrders(symbol, since, limit)

  - Fetch open orders

• fetchClosedOrders(symbol, since, limit)

  - Fetch closed orders

• fetchCanceledOrders(symbol, since, limit)

  - Fetch canceled orders

• fetchOpenOrder(orderId, symbol)

  - Fetch specific open order

• fetchOrdersByStatus(status, symbol)

  - Fetch orders by status

• cancelOrder(orderId, symbol)

  - Cancel single order

• cancelOrders([orderIds], symbol)

  - Cancel multiple orders

• cancelAllOrders(symbol)

  - Cancel all orders for symbol

• editOrder(orderId, symbol, type, side, amount, price)

  - Modify order

Margin & Leverage

• fetchBorrowRate(code)

  - Fetch borrow rate for margin

• fetchBorrowRates([codes])

  - Fetch multiple borrow rates

• fetchBorrowRateHistory(code, since, limit)

  - Historical borrow rates

• fetchCrossBorrowRate(code)

  - Cross margin borrow rate

• fetchIsolatedBorrowRate(symbol, code)

  - Isolated margin borrow rate

• borrowMargin(code, amount, symbol)

  - Borrow margin

• repayMargin(code, amount, symbol)

  - Repay margin

• fetchLeverage(symbol)

  - Fetch leverage

• setLeverage(leverage, symbol)

  - Set leverage

• fetchLeverageTiers(symbols)

  - Fetch leverage tiers

• fetchMarketLeverageTiers(symbol)

  - Leverage tiers for market

• setMarginMode(marginMode, symbol)

  - Set margin mode (cross/isolated)

• fetchMarginMode(symbol)

  - Fetch margin mode

Derivatives & Futures

Positions

• fetchPosition(symbol)

  - Fetch single position

• fetchPositions([symbols])

  - Fetch all positions

• fetchPositionsForSymbol(symbol)

  - Fetch positions for symbol

• fetchPositionHistory(symbol, since, limit)

  - Position history

• fetchPositionsHistory(symbols, since, limit)

  - Multiple position history

• fetchPositionMode(symbol)

  - Fetch position mode (one-way/hedge)

• setPositionMode(hedged, symbol)

  - Set position mode

• closePosition(symbol, side)

  - Close position

• closeAllPositions()

  - Close all positions

Funding & Settlement

• fetchFundingRate(symbol)

  - Current funding rate

• fetchFundingRates([symbols])

  - Multiple funding rates

• fetchFundingRateHistory(symbol, since, limit)

  - Funding rate history

• fetchFundingHistory(symbol, since, limit)

  - Your funding payments

• fetchFundingInterval(symbol)

  - Funding interval

• fetchSettlementHistory(symbol, since, limit)

  - Settlement history

• fetchMySettlementHistory(symbol, since, limit)

  - Your settlement history

Open Interest & Liquidations

• fetchOpenInterest(symbol)

  - Open interest for symbol

• fetchOpenInterests([symbols])

  - Multiple open interests

• fetchOpenInterestHistory(symbol, timeframe, since, limit)

  - OI history

• fetchLiquidations(symbol, since, limit)

  - Public liquidations

• fetchMyLiquidations(symbol, since, limit)

  - Your liquidations

Options

• fetchOption(symbol)

  - Fetch option info

• fetchOptionChain(code)

  - Fetch option chain

• fetchGreeks(symbol)

  - Fetch option greeks

• fetchVolatilityHistory(code, since, limit)

  - Volatility history

• fetchUnderlyingAssets()

  - Fetch underlying assets

Fees & Limits

• fetchTradingFee(symbol)

  - Trading fee for symbol

• fetchTradingFees([symbols])

  - Trading fees for multiple symbols

• fetchTradingLimits([symbols])

  - Trading limits

• fetchTransactionFee(code)

  - Transaction/withdrawal fee

• fetchTransactionFees([codes])

  - Multiple transaction fees

• fetchDepositWithdrawFee(code)

  - Deposit/withdrawal fee

• fetchDepositWithdrawFees([codes])

  - Multiple deposit/withdraw fees

Deposits & Withdrawals

• fetchDepositAddress(code, params)

  - Get deposit address

• fetchDepositAddresses([codes])

  - Multiple deposit addresses

• fetchDepositAddressesByNetwork(code)

  - Addresses by network

• createDepositAddress(code, params)

  - Create new deposit address

• fetchDeposit(id, code)

  - Fetch single deposit

• fetchWithdrawal(id, code)

  - Fetch single withdrawal

• fetchWithdrawAddresses(code)

  - Fetch withdrawal addresses

• fetchWithdrawalWhitelist(code)

  - Fetch whitelist

• withdraw(code, amount, address, tag, params)

  - Withdraw funds

• deposit(code, amount, params)

  - Deposit funds (if supported)

Transfer & Convert

• transfer(code, amount, fromAccount, toAccount)

  - Internal transfer

• fetchTransfer(id, code)

  - Fetch transfer info

• fetchTransfers(code, since, limit)

  - Fetch transfer history

• fetchConvertCurrencies()

  - Currencies available for convert

• fetchConvertQuote(fromCode, toCode, amount)

  - Get conversion quote

• createConvertTrade(fromCode, toCode, amount)

  - Execute conversion

• fetchConvertTrade(id)

  - Fetch convert trade

• fetchConvertTradeHistory(code, since, limit)

  - Convert history

Market Info

• fetchMarkets()

  - Fetch all markets

• fetchCurrencies()

  - Fetch all currencies

• fetchTime()

  - Fetch exchange server time

• fetchStatus()

  - Fetch exchange status

• fetchBorrowInterest(code, symbol, since, limit)

  - Borrow interest paid

• fetchLongShortRatio(symbol, timeframe, since, limit)

  - Long/short ratio

• fetchLongShortRatioHistory(symbol, timeframe, since, limit)

  - L/S ratio history

WebSocket Methods (ccxt.pro)

All REST methods have WebSocket equivalents with

watch*

Real-time Market Data

• watchTicker(symbol)

  - Watch single ticker

• watchTickers([symbols])

  - Watch multiple tickers

• watchOrderBook(symbol)

  - Watch order book updates

• watchOrderBookForSymbols([symbols])

  - Watch multiple order books

• watchTrades(symbol)

  - Watch public trades

• watchOHLCV(symbol, timeframe)

  - Watch candlestick updates

• watchBidsAsks([symbols])

  - Watch best bid/ask

Real-time Account Data (Auth Required)

• watchBalance()

  - Watch balance updates

• watchOrders(symbol)

  - Watch your order updates

• watchMyTrades(symbol)

  - Watch your trade updates

• watchPositions([symbols])

  - Watch position updates

• watchPositionsForSymbol(symbol)

  - Watch positions for symbol

Authentication Required

Methods marked with 🔒 require API credentials:

• All

  create*

  methods (creating orders, addresses)
• All

  cancel*

  methods (canceling orders)
• All

  edit*

  methods (modifying orders)
• All

  fetchMy*

  methods (your trades, orders)

• fetchBalance

  ,

  fetchLedger

  ,

  fetchAccounts

• withdraw

  ,

  transfer

  ,

  deposit

• Margin/leverage methods
• Position methods

• watchBalance

  ,

  watchOrders

  ,

  watchMyTrades

  ,

  watchPositions

Checking Method Availability

Not all exchanges support all methods. Check before using:

// Check if method is supported
if (exchange.has['fetchOHLCV']) {
    const candles = await exchange.fetchOHLCV('BTC/USDT', '1h')
}

// Check multiple capabilities
console.log(exchange.has)
// {
//   fetchTicker: true,
//   fetchOHLCV: true,
//   fetchMyTrades: true,
//   fetchPositions: false,
//   ...
// }

Method Naming Convention

• fetch*

  - REST API methods (HTTP requests)

• watch*

  - WebSocket methods (real-time streams)

• create*

  - Create new resources (orders, addresses)

• cancel*

  - Cancel existing resources

• edit*

  - Modify existing resources

• set*

  - Configure settings (leverage, margin mode)

• *Ws

  suffix - WebSocket variant (some exchanges)

Proxy Configuration

CCXT supports HTTP, HTTPS, and SOCKS proxies for both REST and WebSocket connections.

Setting Proxy

// HTTP Proxy
exchange.httpProxy = 'http://your-proxy-host:port'

// HTTPS Proxy  
exchange.httpsProxy = 'https://your-proxy-host:port'

// SOCKS Proxy
exchange.socksProxy = 'socks://your-proxy-host:port'

// Proxy with authentication
exchange.httpProxy = 'http://user:pass@proxy-host:port'

Proxy for WebSocket

WebSocket connections also respect proxy settings:

exchange.httpsProxy = 'https://proxy:8080'
// WebSocket connections will use this proxy

Testing Proxy Connection

exchange.httpProxy = 'http://localhost:8080'
try {
    await exchange.fetchTicker('BTC/USDT')
    console.log('Proxy working!')
} catch (error) {
    console.error('Proxy connection failed:', error)
}

WebSocket-Specific Methods

Some exchanges provide WebSocket variants of REST methods for faster order placement and management. These use the

*Ws

Trading via WebSocket

Creating Orders:

• createOrderWs

  - Create order via WebSocket (faster than REST)

• createLimitOrderWs

  - Create limit order via WebSocket

• createMarketOrderWs

  - Create market order via WebSocket

• createLimitBuyOrderWs

  - Buy limit order via WebSocket

• createLimitSellOrderWs

  - Sell limit order via WebSocket

• createMarketBuyOrderWs

  - Buy market order via WebSocket

• createMarketSellOrderWs

  - Sell market order via WebSocket

• createStopLimitOrderWs

  - Stop-limit order via WebSocket

• createStopMarketOrderWs

  - Stop-market order via WebSocket

• createStopLossOrderWs

  - Stop-loss order via WebSocket

• createTakeProfitOrderWs

  - Take-profit order via WebSocket

• createTrailingAmountOrderWs

  - Trailing stop via WebSocket

• createTrailingPercentOrderWs

  - Trailing stop % via WebSocket

• createPostOnlyOrderWs

  - Post-only order via WebSocket

• createReduceOnlyOrderWs

  - Reduce-only order via WebSocket

Managing Orders:

• editOrderWs

  - Edit order via WebSocket

• cancelOrderWs

  - Cancel order via WebSocket (faster than REST)

• cancelOrdersWs

  - Cancel multiple orders via WebSocket

• cancelAllOrdersWs

  - Cancel all orders via WebSocket

Fetching Data:

• fetchOrderWs

  - Fetch order via WebSocket

• fetchOrdersWs

  - Fetch orders via WebSocket

• fetchOpenOrdersWs

  - Fetch open orders via WebSocket

• fetchClosedOrdersWs

  - Fetch closed orders via WebSocket

• fetchMyTradesWs

  - Fetch your trades via WebSocket

• fetchBalanceWs

  - Fetch balance via WebSocket

• fetchPositionWs

  - Fetch position via WebSocket

• fetchPositionsWs

  - Fetch positions via WebSocket

• fetchPositionsForSymbolWs

  - Fetch positions for symbol via WebSocket

• fetchTradingFeesWs

  - Fetch trading fees via WebSocket

When to Use WebSocket Methods

Use

*Ws

• You need faster order placement (lower latency)
• You're already connected via WebSocket
• You want to reduce REST API rate limit usage
• Trading strategies require sub-100ms latency

Use REST methods when:

• You need guaranteed execution confirmation
• You're making one-off requests
• The exchange doesn't support the WebSocket variant
• You need detailed error responses

Example: Order Placement Comparison

REST API (slower, more reliable):

const order = await exchange.createOrder('BTC/USDT', 'limit', 'buy', 0.01, 50000)

WebSocket API (faster, lower latency):

const order = await exchange.createOrderWs('BTC/USDT', 'limit', 'buy', 0.01, 50000)

Checking WebSocket Method Availability

Not all exchanges support WebSocket trading methods:

if (exchange.has['createOrderWs']) {
    // Exchange supports WebSocket order creation
    const order = await exchange.createOrderWs('BTC/USDT', 'limit', 'buy', 0.01, 50000)
} else {
    // Fall back to REST
    const order = await exchange.createOrder('BTC/USDT', 'limit', 'buy', 0.01, 50000)
}

Authentication

Setting API Keys

<?php
// During instantiation (recommended)
$exchange = new \ccxt\binance([
    'apiKey' => getenv('BINANCE_API_KEY'),
    'secret' => getenv('BINANCE_SECRET'),
    'enableRateLimit' => true
]);

// After instantiation
$exchange->apiKey = getenv('BINANCE_API_KEY');
$exchange->secret = getenv('BINANCE_SECRET');

Testing Authentication

try {
    $balance = $exchange->fetch_balance();
    print_r('Authentication successful!');
} catch (\ccxt\AuthenticationError $e) {
    print_r('Invalid API credentials');
}

Error Handling

Exception Hierarchy

BaseError
├─ NetworkError (recoverable - retry)
│  ├─ RequestTimeout
│  ├─ ExchangeNotAvailable
│  ├─ RateLimitExceeded
│  └─ DDoSProtection
└─ ExchangeError (non-recoverable - don't retry)
   ├─ AuthenticationError
   ├─ InsufficientFunds
   ├─ InvalidOrder
   └─ NotSupported

Basic Error Handling

<?php
try {
    $ticker = $exchange->fetch_ticker('BTC/USDT');
} catch (\ccxt\NetworkError $e) {
    echo 'Network error - retry: ' . $e->getMessage();
} catch (\ccxt\ExchangeError $e) {
    echo 'Exchange error - do not retry: ' . $e->getMessage();
} catch (\Exception $e) {
    echo 'Unknown error: ' . $e->getMessage();
}

Specific Exception Handling

<?php
try {
    $order = $exchange->create_order('BTC/USDT', 'limit', 'buy', 0.01, 50000);
} catch (\ccxt\InsufficientFunds $e) {
    echo 'Not enough balance';
} catch (\ccxt\InvalidOrder $e) {
    echo 'Invalid order parameters';
} catch (\ccxt\RateLimitExceeded $e) {
    echo 'Rate limit hit - wait before retrying';
    sleep(1);  // Wait 1 second
} catch (\ccxt\AuthenticationError $e) {
    echo 'Check your API credentials';
}

Retry Logic for Network Errors

<?php
function fetch_with_retry($exchange, $max_retries = 3) {
    for ($i = 0; $i < $max_retries; $i++) {
        try {
            return $exchange->fetch_ticker('BTC/USDT');
        } catch (\ccxt\NetworkError $e) {
            if ($i < $max_retries - 1) {
                echo "Retry " . ($i + 1) . "/$max_retries\n";
                sleep(1 * ($i + 1));  // Exponential backoff
            } else {
                throw $e;
            }
        }
    }
}

Rate Limiting

Built-in Rate Limiter (Recommended)

$exchange = new \ccxt\binance([
    'enableRateLimit' => true  // Automatically throttles requests
]);

Manual Delays

$exchange->fetch_ticker('BTC/USDT');
usleep($exchange->rateLimit * 1000);  // Convert ms to microseconds
$exchange->fetch_ticker('ETH/USDT');

Checking Rate Limit

print_r($exchange->rateLimit);  // Milliseconds between requests

Common Pitfalls

Forgetting Timezone Setting

// Wrong - will cause errors
<?php
require_once 'vendor/autoload.php';
$exchange = new \ccxt\binance();  // ERROR!

// Correct
<?php
date_default_timezone_set('UTC');  // Required!
require_once 'vendor/autoload.php';
$exchange = new \ccxt\binance();

Wrong Namespace Format

// Wrong - missing leading backslash
$exchange = new ccxt\binance();  // May fail!

// Correct
$exchange = new \ccxt\binance();  // Leading backslash!

Using REST for Real-time Monitoring

// Wrong - wastes rate limits
while (true) {
    $ticker = $exchange->fetch_ticker('BTC/USDT');  // REST
    print_r($ticker['last']);
    sleep(1);
}

// Correct - use WebSocket
use function React\Async\await;
$exchange = new \ccxt\pro\binance();
while (true) {
    $ticker = await($exchange->watch_ticker('BTC/USDT'));  // WebSocket
    print_r($ticker['last']);
}

Not Closing WebSocket Connections

// Wrong - memory leak
$exchange = new \ccxt\pro\binance();
$ticker = await($exchange->watch_ticker('BTC/USDT'));
// Forgot to close!

// Correct
$exchange = new \ccxt\pro\binance();
try {
    while (true) {
        $ticker = await($exchange->watch_ticker('BTC/USDT'));
    }
} finally {
    await($exchange->close());
}

Not Checking PHP Extensions

// Check required extensions before running
<?php
$required = ['curl', 'mbstring', 'iconv', 'gmp'];
foreach ($required as $ext) {
    if (!extension_loaded($ext)) {
        die("Error: $ext extension is not loaded\n");
    }
}

Troubleshooting

Common Issues

1. "date_default_timezone_get(): Invalid date.timezone"

• Solution: Add

  date_default_timezone_set('UTC');

  at the top

2. "Class 'ccxt\binance' not found"

• Solution: Run

  composer require ccxt/ccxt

• Check you're using

  \ccxt\binance

  with leading backslash

3. "RateLimitExceeded"

• Solution: Enable rate limiter:

  'enableRateLimit' => true

4. "AuthenticationError"

• Solution: Check API key and secret
• Verify API key permissions on exchange
• Check system clock is synced

5. "InvalidNonce"

• Solution: Sync system clock
• Use only one exchange instance per API key

6. Missing PHP extensions

• Solution: Install required extensions:
  • Ubuntu/Debian:

    apt-get install php-curl php-mbstring php-gmp

  • macOS: Usually pre-installed
  • Windows: Enable in php.ini

Debugging

// Enable verbose logging
$exchange->verbose = true;

// Check exchange capabilities
print_r($exchange->has);
// Array(
//   'fetchTicker' => true,
//   'fetchOrderBook' => true,
//   'createOrder' => true,
//   ...
// )

// Check market information
print_r($exchange->markets['BTC/USDT']);

// Check last request/response
print_r($exchange->last_http_response);
print_r($exchange->last_json_response);

Learn More

• CCXT Manual
• CCXT Pro Documentation
• Supported Exchanges
• GitHub Repository