<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue; $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue); switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}$currentPage = $_SERVER["PHP_SELF"];$maxRows_rsArt = 5;
$pageNum_rsArt = 0;
if (isset($_GET['pageNum_rsArt'])) {
$pageNum_rsArt = $_GET['pageNum_rsArt'];
}
$startRow_rsArt = $pageNum_rsArt * $maxRows_rsArt;mysql_select_db($database_bbs, $bbs);
$query_rsArt = "SELECT * FROM articles ORDER BY artid DESC";
$query_limit_rsArt = sprintf("%s LIMIT %d, %d", $query_rsArt, $startRow_rsArt, $maxRows_rsArt);
$rsArt = mysql_query($query_limit_rsArt, $bbs) or die(mysql_error());
$row_rsArt = mysql_fetch_assoc($rsArt);if (isset($_GET['totalRows_rsArt'])) {
$totalRows_rsArt = $_GET['totalRows_rsArt'];
} else {
$all_rsArt = mysql_query($query_rsArt);
$totalRows_rsArt = mysql_num_rows($all_rsArt);
}
$totalPages_rsArt = ceil($totalRows_rsArt/$maxRows_rsArt)-1;$queryString_rsArt = "";
if (!empty($_SERVER['QUERY_STRING'])) {
$params = explode("&", $_SERVER['QUERY_STRING']);
$newParams = array();
foreach ($params as $param) {
if (stristr($param, "pageNum_rsArt") == false &&
stristr($param, "totalRows_rsArt") == false) {
array_push($newParams, $param);
}
}
if (count($newParams) != 0) {
$queryString_rsArt = "&" . htmlentities(implode("&", $newParams));
}
}
$queryString_rsArt = sprintf("&totalRows_rsArt=%d%s", $totalRows_rsArt, $queryString_rsArt);
?>我想知道这段代码是什么意思,有什么作用?
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue; $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue); switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}$currentPage = $_SERVER["PHP_SELF"];$maxRows_rsArt = 5;
$pageNum_rsArt = 0;
if (isset($_GET['pageNum_rsArt'])) {
$pageNum_rsArt = $_GET['pageNum_rsArt'];
}
$startRow_rsArt = $pageNum_rsArt * $maxRows_rsArt;mysql_select_db($database_bbs, $bbs);
$query_rsArt = "SELECT * FROM articles ORDER BY artid DESC";
$query_limit_rsArt = sprintf("%s LIMIT %d, %d", $query_rsArt, $startRow_rsArt, $maxRows_rsArt);
$rsArt = mysql_query($query_limit_rsArt, $bbs) or die(mysql_error());
$row_rsArt = mysql_fetch_assoc($rsArt);if (isset($_GET['totalRows_rsArt'])) {
$totalRows_rsArt = $_GET['totalRows_rsArt'];
} else {
$all_rsArt = mysql_query($query_rsArt);
$totalRows_rsArt = mysql_num_rows($all_rsArt);
}
$totalPages_rsArt = ceil($totalRows_rsArt/$maxRows_rsArt)-1;$queryString_rsArt = "";
if (!empty($_SERVER['QUERY_STRING'])) {
$params = explode("&", $_SERVER['QUERY_STRING']);
$newParams = array();
foreach ($params as $param) {
if (stristr($param, "pageNum_rsArt") == false &&
stristr($param, "totalRows_rsArt") == false) {
array_push($newParams, $param);
}
}
if (count($newParams) != 0) {
$queryString_rsArt = "&" . htmlentities(implode("&", $newParams));
}
}
$queryString_rsArt = sprintf("&totalRows_rsArt=%d%s", $totalRows_rsArt, $queryString_rsArt);
?>我想知道这段代码是什么意思,有什么作用?
解决方案 »
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