Wait for Z39.50 requests to complete

# yaz_wait

(PHP 4 >= 4.0.1, PECL yaz >= 0.9.0)

yaz_wait — Wait for Z39.50 requests to complete

### 说明

function yaz_wait(array `&$options` = ?): mixed

This function carries out networked (blocked) activity for outstanding requests which have been prepared by the functions yaz_connect(), yaz_search(), yaz_present(), yaz_scan() and yaz_itemorder().

yaz_wait() returns when all servers have either completed all requests or aborted (in case of errors).

### 参数

`options`

  An associative array of options:

  `timeout`

    Sets timeout in seconds. If a server has not responded within the timeout it is considered dead and yaz_wait() returns. The default value for timeout is 15 seconds.

  `event`

    A boolean.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。 In event mode, returns resource 或者在失败时返回 `false`.

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