本文實(shí)例講述了php快速查找數(shù)據(jù)庫(kù)中惡意代碼的方法。分享給大家供大家參考。具體如下：
數(shù)據(jù)庫(kù)被輸入惡意代碼，為了保證你的數(shù)據(jù)庫(kù)的安全，你必須得小心去清理。有了下面一個(gè)超級(jí)方便的功能，即可快速清除數(shù)據(jù)庫(kù)惡意代碼。
function cleanInput($input) {
$search = array(
, // Strip out javascript
, // Strip out HTML tags
'@
]*?>.*?
@siU', // Strip style tags properly
// Strip multi-line comments
);
$output = preg_replace($search, '', $input);
return $output;
}
function sanitize($input) {
if (is_array($input)) {
foreach($input as $var=>$val) {
$output[$var] = sanitize($val);
}
}
else {
if (get_magic_quotes_gpc()) {
$input = stripslashes($input);
}
$input = cleanInput($input);
$output = mysql_real_escape_string($input);
}
return $output;
}
// Usage:
$bad_string = "Hi! It's a good day!";
$good_string = sanitize($bad_string);
// $good_string returns "Hi! It\'s a good day!"
// Also use for getting POST/GET variables
$_POST = sanitize($_POST);
$_GET = sanitize($_GET);