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Two simple ways to prevent SQL injection attacks and XSS attacks in PHP_PHP Tutorial
Two simple ways to prevent SQL injection attacks and XSS attacks in PHP_PHP Tutorial
mysql_real_escape_string()
So if the SQL statement is written like this: "select * from cdr where src =".$userId;, it must be changed to $userId=mysql_real_escape_string($userId)
All printing statements such as echo, print, etc. must be filtered using htmlentities() before printing. This can prevent Xss. Note that in Chinese, htmlentities($name,ENT_NOQUOTES,GB2312) must be written.
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