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# yaz_ccl_parse

(PHP 4 >= 4.0.5, PHP 5)

yaz_ccl_parse -- Invoke CCL Parser

## Description

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 yaz_search() function to perform a search. To define a set of valid CCL fields call yaz_ccl_conf() prior to this function. If the supplied `query` was successfully converted to RPN, this function returns `TRUE`, and the index `rpn` of the supplied array `result` holds a valid RPN query. If the query could not be converted (because of invalid syntax, unknown field, etc.) this function returns `FALSE` and three indexes are set in the resulting array to indicate the cause of failure: `errorcode` CCL error code (integer), `errorstring` CCL error string, and `errorpos` approximate position in query of failure (integer is character position).

예 1. CCL Parsing

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

`<?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); } ?>`

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yaz_ccl_conf | 위로 | yaz_close