Sets default callback to handle requests that are not caught by specific callbacks

# EventHttp::setDefaultCallback

(PECL event >= 1.4.0-beta)

EventHttp::setDefaultCallback — Sets default callback to handle requests that are not caught by specific callbacks

### 说明

public function EventHttp::setDefaultCallback( string `$cb` , string `$arg` = ?): void

Sets default callback to handle requests that are not caught by specific callbacks

### 参数

`cb`

  The callback callable. It should match the following prototype:

  function callback( EventHttpRequest `$req` = NULL , mixed `$arg` = NULL ): void
  `req`

    EventHttpRequest object.

  `arg`

    Custom data.

`arg`

  User custom data passed to the callback.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

示例 #1 EventHttp::setDefaultCallback() example

    <?php
    $base = new EventBase();
    $http = new EventHttp($base);

    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

    if (!$http->bind("127.0.0.1", 8088)) {
        exit("bind(1) failed\n");
    };

    $http->setDefaultCallback(function($req) {
        echo "URI: ", $req->getUri(), PHP_EOL;
        $req->sendReply(200, "OK");
    });

    $base->dispatch();
    ?>

### 参见

- EventHttp::setCallback() - Sets a callback for specified URI

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