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ritmex-bot/docs/ccxt/wiki/examples/php/order-book-level-depth-extra-param.md
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2025-10-03 15:28:16 +08:00

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- [Order Book Level Depth Extra Param](./examples/php/)
```php
<?php
include './ccxt.php';
date_default_timezone_set('UTC');
// instantiate the exchange by id
$exchange = '\\ccxt\\kraken';
$exchange = new $exchange ();
$limit = 10; // up to ten order on each side, for example
var_dump ($exchange->fetch_order_book ('BTC/USD', $limit));
?>
```