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# yaz_connect

(PHP 4 >= 4.0.1, PHP 5)

yaz_connect -- Prepares for a connection to a Z39.50 server.

## Description

resource yaz_connect ( string zurl [, mixed options])

This function returns a connection resource on success, zero on failure.

yaz_connect() prepares for a connection to a Z39.50 server. The `zurl` argument takes the form host[:port][/database]. If port is omitted, port 210 is used. If database is omitted `Default` is used. This function is non-blocking and does not attempt to establish a connection - it merely prepares a connect to be performed later when yaz_wait() is called.

If the second argument, `options`, is given as a string it is treated as the Z39.50 V2 authentication string (OpenAuth).

If `options` is given as an array the contents of the array serves as options. Note that array options are only supported for PHP 4.1.0 and later.

yaz_connect() options

user

  Username for authentication.

group

  Group for authentication.

password

  Password for authentication.

cookie

  Cookie for session (YAZ proxy).

proxy

  Proxy for connection (YAZ proxy).

persistent

  A boolean. If `TRUE` the connection is persistent; If `FALSE` the connection is not persistent. By default connections are persistent.

piggyback

  A boolean. If `TRUE` piggyback is enabled for searches; If `FALSE` piggyback is disabled. By default piggyback is enabled. Enabling piggyback is more efficient and usually saves a network-round-trip for first time fetches of records. However, a few Z39.50 servers do not support piggyback or they ignore element set names. For those, piggyback should be disabled.

charset

  A string that specifies character set to be used in Z39.50 language and character set negotiation. Use strings such as: `ISO-8859-1`, `UTF-8`, `UTF-16`.

  Most Z39.50 servers do not support this feature (and thus, this is ignored). Many servers use the ISO-8859-1 encoding for queries and messages. MARC21/USMARC records are not affected by this setting.

> Anmerkung: The use of a proxy often improves performance. A Z39.50 proxy is part of the free YAZ++ package.

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