Security risks and vulnerabilities associated with PHP’s mysql_ functions

 Here are some considerations about mysql extension:

The mysql_* extension is completely obsolete and has been officially removed from PHP since version 7.0 (2015). Continuing to use it requires running an end-of-life version of PHP that no longer receives security patches, leaving your server vulnerable to exploits. Furthermore, it lacks modern database features such as:

• Security: No support for prepared statements or parameterized queries (the standard for preventing SQL injection).

• Performance: Missing asynchronous, non-blocking query capabilities.

• Functionality: No support for transactions, stored procedures, or multiple statements.

• Compatibility: It cannot handle the modern password authentication used in MySQL 5.6+ and lacks all features introduced in MySQL 5.1 or later.

 Here is a table of some considerations to have in mind:

Feature	Status in mysql_*	Modern Alternative (PDO/MySQLi)
Prepared Statements	❌ Not Supported	✅ Standard (Prevents SQLi)
Transactions	❌ Not Supported	✅ Full Support
Asynchronous Queries	❌ Not Supported	✅ Supported
Stored Procedures	❌ Not Supported	✅ Full Support
Modern Password Auth	❌ Incompatible	✅ Native Support

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How to: Extract file extension with PHP

People from other scripting languages always think theirs is better because they have a built in function to do that and not PHP (I am looking at pythonistas right now.

In fact, it does exist, but few people know it. Meet pathinfo():

$ext = pathinfo($filename, PATHINFO_EXTENSION);

This is fast, efficient, reliable and built-in. pathinfo() can give you other information, such as canonical path, depending on the constant you pass to it.

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