PHP SQL anti-injection code collection_PHP tutorial

SQL anti-injection code one

Copy code The code is as follows:

/**
* Prevent sql injection
* @author: zhuyubing@gmail.com
**/
/**
* reject sql inject
*/
if (!function_exists (quote))
{
function quote($var)
{
if (strlen($var))
{
$var=!get_magic_quotes_gpc() ? $var : stripslashes($var);
$var = str_replace("'","'" ,$var);
}
return "'$var'";
}
}
if (!function_exists (hash_num)){
function hash_num($input)
{
$hash = 5381;
for ($i = 0; $i < strlen($str); $i++)
{
$c = ord($str{$ i});
$hash = (($hash << 5) + $hash) + $c;
}
return $hash;
}
}
/**************** end *************************/
?>

Copy code The code is as follows:

/**
* 防sql测试代码
CREATE TABLE IF NOT EXISTS `tb` (
`id` int(10) unsigned NOT NULL auto_increment,
`age` tinyint(3) unsigned NOT NULL,
`name` char(100) NOT NULL,
`note` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ;
**/
include_once('common.php');
var_dump(hash_num('dddd'));
if( empty($_GET))
{
$_GET = array('age'=>'99','name'=>'a'b\'c";','note'=> ;"a'b'nc#");
}
$age = (int)$_GET['age'];
$name = quote($_GET['name']);
$note = quote($_GET['note']);
$sql = "INSERT INTO `tb` ( `age`, `name`, `note`) VALUES
( $age, $ name, $note)";
var_dump($sql);
?>

PHP prevent sql injection function code 2:

Copy code The code is as follows:

$magic_quotes_gpc = get_magic_quotes_gpc();
@extract(daddslashes($ _COOKIE));
@extract(daddslashes($_POST));
@extract(daddslashes($_GET));
if(!$magic_quotes_gpc) {
$_FILES = daddslashes($_FILES );
}

function daddslashes($string, $force = 0) {
if(!$GLOBALS['magic_quotes_gpc'] || $force) {
if(is_array( $string)) {
foreach($string as $key => $val) {
$string[$key] = daddslashes($val, $force);
}
} else {
$string = addslashes($string);
}
}
return $string;
}
?>

PHP prevents sql injection code three

Copy code The code is as follows:

function inject_check($sql_str) { // Prevent injection
$check = eregi('select|insert|update|delete|'|/*|*|../|./|union|into|load_file|outfile', $sql_str);
if ($check) {
echo "Enter illegal injection content! ";
exit ();
} else {
return $sql_str;
}
}
function checkurl() { //Check the source
if (preg_replace( "/httpstutorial?://([^:/]+).*/i", "1", $_server['http_referer']) !== preg_replace("/([^:]+).* /", "1", $_server['http_host'])) {
header("location: http://s.jb51.net");
exit();
}
}
//Call
checkurl();
$str = $_get['url'];
inject_check($sql_str);//This can be performed when getting parameters

http://www.bkjia.com/PHPjc/319028.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/319028.htmlTechArticleSQL anti-injection code 1 copy code is as follows: ?php /*** Prevent sql injection * @author: zhuyubing@gmail.com **/ /*** reject sql inject*/ if (!function_exists (quote)) { function quo...