The following iconic comic, known as Bobby Tables, is an excellent portrayal of how an SQL injection attack might work. When it comes to security, you should never be complacent, no matter how secure you think your system is. ![]() The goal of this tutorial is to transform someone with little to no knowledge of prepared statements, into an expert.ĭisclaimer: Don't actually be as laid back as this database manager. Prepared statements may seem intimidating at first, but once you get hang of it, it’ll seem like second nature to you. Escaping is not necessary, since it will treat the values as literals all attempts to inject sql queries will be interpreted as such. You basically just create the query template with placeholder values, and then replace the dummy inputs with the real ones. If implemented correctly, prepared statements (aka parameterized queries) offer superior protection against SQL injection. ![]() However, it is undoubtedly a good idea to take proper precautions. Hopefully this scenario will never happen to your website. Why? You know that these scrubs are are no match for those prepared statements you coded! In fact, you find this humorous, as these hackers will likely be annoyed that they wasted their time with futile attempts. Ironically, as the database manager, you remain the calmest. An impromptu staff meeting has been called at 2am, and everyone in the company is freaking out. Also, here's a great resource to learn PDO prepared statements, which is the better choice for beginners and most people in general.Ī hack attempt has recently been discovered, and it appears they are trying to take down the entire database. ![]() ![]() The example is lack of insert_id in multi_query.Before I start, if you'd like to see an even easier way to use MySQLi prepared statements, check out my wrapper class. Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search
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