rsfilter.inc.php

开源MARC数据处理

<?php
/** 
 * @version V4.21 20 Mar 2004 (c) 2000-2004 John Lim ([e-mail]). All rights reserved.
 * Released under both BSD license and Lesser GPL library license. 
 * Whenever there is any discrepancy between the two licenses, 
 * the BSD license will take precedence. 
 *
 * Set tabs to 4 for best viewing.
 * 
 * Latest version is available at http://php.weblogs.com
 *
 * Requires PHP4.01pl2 or later because it uses include_once
*/

/*
	Filter all fields and all rows in a recordset and returns the 
	processed recordset. We scroll to the beginning of the new recordset
	after processing.
	
	We pass a recordset and function name to RSFilter($rs,'rowfunc');
	and the function will be called multiple times, once
	for each row in the recordset. The function will be passed
	an array containing one row repeatedly.
	
	Example: 
 	
	// ucwords() every element in the recordset
	function do_ucwords(&$arr,$rs)
	{
		foreach($arr as $k => $v) {
			$arr[$k] = ucwords($v);
		}
	}
	$rs = RSFilter($rs,'do_ucwords');
 */
function &RSFilter($rs,$fn)
{
	if ($rs->databaseType != 'array') {
		if (!$rs->connection) return false;
		
		$rs = &$rs->connection->_rs2rs($rs);
	}
	$rows = $rs->RecordCount();
	for ($i=0; $i < $rows; $i++) {
		$fn($rs->_array[$i],$rs);
	}
	if (!$rs->EOF) {
		$rs->_currentRow = 0;
		$rs->fields = $rs->_array[0];
	}
	
	return $rs;
}
?>