PHP/YAZ is an extension to the popular web server language PHP that implements Z39.50 origin (client) functionality as well as the SRW/SRU protocols.
The following Z39.50 services are supported by this extension: init, search, present, scan and sort. The extension can handle GRS-1, MARC, SUTRS and XML. The module also allows you to convert MARC in ISO2709 to MARCXML on the client side.
The PHP/YAZ extension is part of PHP 4.0.1 and later but has now been moved to PECL. As a PECL module, PHP/YAZ is now independent of PHP versions. It works with both PHP 4 and PHP 5.
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Visit the PHP/YAZ package page at PECL.