yaz_ccl_parse

yaz_ccl_parse

Invoke CCL Parser

bool **yaz_ccl_parse** resource $id string $query array $result

This function invokes a CCL parser. It converts a given CCL FIND query to an RPN query which may be passed to the
function to perform a search. yaz_search

To define a set of valid CCL fields call
prior to this function. yaz_ccl_conf

id The connection resource returned by . yaz_connect

queryThe CCL FIND query.

result If the function was executed successfully, this will be an array containing the valid RPN query under the key . rpn

   Upon failure, three indexes are set in this array to indicate the cause
   of failure: 
   
  - - the CCL error code (integer)          `errorcode`

• • the CCL error string errorstring
• • approximate position in query of failure (integer is character position) errorpos

return.success

Voorbeeld: CCL Parsing

We will try to search using CCL. In the example below,  
 is a CCL query. 

$ccl

<?php

yaz_ccl_conf($id, $fields);  // see example for yaz_ccl_conf
if (!yaz_ccl_parse($id, $ccl, $cclresult)) {
    echo 'Error: ' . $cclresult["errorstring"];
} else {
    $rpn = $cclresult["rpn"];
    yaz_search($id, "rpn", $rpn);
}
?>