<?php
/**------------------------------------------------------------------------------
* Title: Usage example of the Pragmatic BNF-a-like parser
* Filename: example_sql.php
* Version: 0.2
* Author: Richard Keizer
* Email: ra dot keizer at gmail dot com
*-------------------------------------------------------------------------------
* COPYRIGHT (c) 2011 Richard Keizer
*
* The source code included in this package is free software; you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation. This license can be
* read at:
*
* http://www.opensource.org/licenses/gpl-license.php
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*------------------------------------------------------------------------------
*
*
* the SQL grammar used herein is just a small subset of the
* real deal, it just serves as an example how to write a grammar file.
*
* note Parts of the regex used by the tokenizer come from an unknown source.
* I rewrote it to fit my needs, I hope I don't violate anyones license.
* pls contact me to get proper credits!
*
*/
error_reporting(E_ALL);
ini_set('display_errors', 1);
include_once 'parser.class.php';
include_once 'SQL/SQLLexer.class.php';
$parser = new Parser(
new Grammar(file_get_contents('SQL/sql.grammar.txt')),
new SQLLexer('SELECT a,b,c FROM BOOKSTORE.authors WHERE (age<150) OR (lastname IN ("Verne", "Dickens"))')
);
echo $parser->createParsetree()->saveXML();
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