PHP prevents SQL injection by filtering paging parameters_PHP tutorial

We have heard this saying, don’t trust any input information on the Internet, we all must filter parameters. Now I will introduce filtering paging parameters, friends in need can refer to it.

Example

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代码如下

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$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-大冶实验高中首届宏志班网站'; } else{     $data ['title'] = '留言本-大冶实验高中首届宏志班网站'; }   $data ['liuyan'] = $this->ly->getLy ( $pernum, $currentnum );

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

$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'] = 'First page';
$config ['last_link'] = 'Last page';
$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){
$data ['title'] = 'Page'.$current_page.'-Guestbook-Website of the First Hongzhi Class of Daye Experimental High School';
}
else{
$data ['title'] = 'Guestbook-Website of the First Hongzhi Class of Daye Experimental High School';
}

$data ['liuyan'] = $this->ly->getLy ( $pernum, $currentnum );

Among them:

The code is as follows

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$current_page=is_numeric($this->uri->segment ( 3 ))?intval($this->uri->segment ( 3 )):1; $currentnum = is_numeric($this->uri->segment ( 3 ))?(intval($this->uri->segment ( 3 ) - 1)) * $pernum; These two sentences determine whether the parameter is a number. Prevent illegal character input. http://www.bkjia.com/PHPjc/629630.html www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/629630.htmlTechArticleWe have heard this saying, don’t trust any input information on the Internet, we must all make parameters Filtering, let me introduce the filtering paging parameters. Friends in need can refer to...