This function returns a connection resource on success;
zero on failure.
yaz_connect() prepares for a
connection to a Z39.50 target. The
zurl argument takes the form host[:port][/database].
If port is omitted 210 is used. If database is omitted Default is used. This function is
non-blocking and doesn't attempt to establish a socket - 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
Username for authentication.
Group for authentication.
Password for authentication.
Cookie for session (YAZ proxy).
Proxy for connection (YAZ proxy).
A boolean. If TRUE
the connection is persistent; If
FALSE the connection is not persistent. By
default connections are persistent.
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 targets doesn't support piggyback or they ignore
element set names. For those, piggyback should be
disabled.
注: The use of a proxy often improves performance. A Z39.50 proxy is part of the free YAZ++ package.