Home  >  Article  >  php教程  >  php防止sql注入之过滤分页参数实例,sql分页

php防止sql注入之过滤分页参数实例,sql分页

WBOY
WBOYOriginal
2016-06-13 09:22:241116browse

php防止sql注入之过滤分页参数实例,sql分页

本文实例讲述了php防止sql注入中过滤分页参数的方法。分享给大家供大家参考。具体分析如下:

就网络安全而言,在网络上不要相信任何输入信息,对于任何输入信息我们都必须进行参数过滤。对此,我们先来看看下面的实例:

复制代码 代码如下:

$this->load->library ( 'pagination' );
$config ['base_url'] = site_url () . '/guest/show';
$config ['total_rows'] = $c;
$config ['per_page'] = $pernum = 15;
$config ['uri_segment'] = 3;
$config ['use_page_numbers'] = TRUE;
$config ['first_link'] = '第一页';
$config ['last_link'] = '最后一页';
$config ['num_links'] = 5;
$this->pagination->initialize ( $config );
if (! $this->uri->segment ( 3 )) {
    $currentnum = 0;
} else {
    $currentnum = is_numeric($this->uri->segment ( 3 ))?(intval($this->uri->segment ( 3 ) - 1)) * $pernum:0;
}
 
$current_page=is_numeric($this->uri->segment ( 3 ))?intval($this->uri->segment ( 3 )):1;
if($current_page){
    $data ['title'] = '第'.$current_page.'页-留言本-防SQL注入测试';
}
else{
    $data ['title'] = '留言本-防SQL注入测试';
}
 
$data ['liuyan'] = $this->ly->getLy ( $pernum, $currentnum );


其中:

复制代码 代码如下:

$current_page=is_numeric($this->uri->segment ( 3 ))?intval($this->uri->segment ( 3 )):1;
$currentnum = is_numeric($this->uri->segment ( 3 ))?(intval($this->uri->segment ( 3 ) - 1)) * $pernum;


这两句判断了参数是否为数字。防止非法字符输入。

希望本文所述对大家的PHP程序设计有所帮助。

php过滤sql注入,新手

我在PHP4环境下写了一个防SQL注入的代码,经过实际使用在PHP5下也兼容,欢迎大家使用修改,使用。
代码如下:
/*
sqlin 防注入类
*/
class sqlin
{

//dowith_sql($value)
function dowith_sql($str)
{
$str = str_replace("and","",$str);
$str = str_replace("execute","",$str);
$str = str_replace("update","",$str);
$str = str_replace("count","",$str);
$str = str_replace("chr","",$str);
$str = str_replace("mid","",$str);
$str = str_replace("master","",$str);
$str = str_replace("truncate","",$str);
$str = str_replace("char","",$str);
$str = str_replace("declare","",$str);
$str = str_replace("select","",$str);
$str = str_replace("create","",$str);
$str = str_replace("delete","",$str);
$str = str_replace("insert","",$str);
$str = str_replace("'","",$str);
$str = str_replace(""","",$str);
$str = str_replace(" ","",$str);
$str = str_replace("or","",$str);
$str = str_replace("=","",$str);
$str = str_replace("%20","",$str);
//echo $str;
return $str;
}
//aticle()防SQL注入函数
function sqlin()
{
foreach ($_GET as $key=>$value)
{
$_GE......余下全文>>
 

PHP防SQL注入问题

基本上我都是用htmlspecialchars()和mysql_escape_string()这两个方法把获取到的参数处理一下。。
 

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn