Learn how to write secure PHP applications to improve your reputation and impress your clients.

According to Slash Data, there were 5.9 million active PHP developers in 2018:

source: Slashdata

Today, this number is probably higher. And it will likely keep growing in the future.

How do you stand out among so many developers like you?

How do you get noticed by the best clients in such a crowded market?

Think about what your clients want.

Each client has its needs, but there is one thing everyone is looking for: SECURITY.

All your clients are scared by the risk of being hacked. They are all afraid that the next attack will disrupt their businesses.

And they don’t sleep at night, worried that someone could steal their data. Or worse… their customers’ data.


Security is a top priority for every kind of PHP project, including:

Freelancers and companies websites

How can you trust a freelancer or a company that cannot even keep its website safe?

Online services and SAAS

An attack can take the whole service offline and compromise the customers’ data.

WordPress plugins and themes

When a vulnerability is found in a plugin or theme, reviews and ratings fall down.

Back-end and REST services

Hackers can access sensitive data, take the services offline or use them for DDOS attacks.

But… your clients want to care about their own businesses.

Yes, they are scared by all the security risks. But they would gladly let their developers take care of that.

Problem is: not every developer can guarantee them the security they want.

Now, imagine if YOU could give your clients the safety they need.

You could provide them the PHP code and the security.

Why should they hire another developer, and keep living in fear of the next attack, when they can let you do the work and stop worrying?

It’s a win-win situation: you get the job, your clients get the security.



PHP Security Mastery

PHP Security Mastery is a step-by-step learning course with one, specific goal:
Teach you how to write secure PHP applications.

This course is for you if:


You know nothing about PHP security, and you want to learn starting from scratch.


You have some experience with PHP security, but you want to become 100% confident about it.


You are confused about all the security risks and defense techniques, and you want to clear all your doubts.

How will this course help you?

1. Finally, no more doubts about PHP security.

There are different ways attackers can hit you, from Sessions Hijacking to XSS attacks.
By the end of this course you will know them all. No more doubts or worrying about your code security.


2. Make your code secure, in practice.

How do you make your code secure, in practice?
This course will show how to handle each risk, with working examples you can use right away.


3. Help your clients secure their PHP applications.

With your new skills, you will provide your clients with safe PHP projects and help them secure their own applications.

1. Clear all your doubts.

2. Make your code secure.

3. Make your clients’ code secure.

What makes PHP Security Mastery different?

Many PHP courses are confusing and hard to follow.

They provide incomplete and unclear lessons, along with too much useless information and theory.

Such courses leave you even more confused than before.

When it happened to me, I felt like I wasted my time and money.


This is why I designed PHP Security Mastery to be crystal clear and easy to follow.

With PHP Security Mastery, you can be sure to get the most out of every lesson and acquire a real skill.

Here is how:


  • Each security concept is introduced and explained.
    This step clears any doubt you may have about a vulnerability or a defense technique.
    Nothing in the course is left unexplained.


  • The course provides you with the PHP code implementation of each technique, so you’ll have no doubts about how it works in practice.
    And you can copy and use the code right away.


  • The course contains examples of attacks and defense techniques.
    So, you can see how it all works in a real context.

Confusing courses

You finish the course more confused than before.


PHP Security Mastery

Everything about PHP security will be clear.

About the author.

Hi, I’m Alex, the author of PHP Security Mastery.

I have been working as a PHP developer since the early 2000’s.
After becoming passionate about web programming while building a music website, I started working as a freelance PHP developer.

I eventually got hired by my city’s University as web developer and system administrator.

A few years later, I joined my current hi-tech company where I focus on web services, data analysis and security.

What’s inside the course?


Chapter 1


  • Introduction to variable validation
  • Type checking
  • Integer checking
  • Float checking
  • Limit checking for numbers
  • Limit checking for strings and other types
  • JSON validation
  • JSON validation: example
  • Filters and string functions
  • Custom validation functions
  • Regular expressions as filters
  • Blacklists
  • Whitelists
  • Type casting for validation?
  • Quiz

Chapter 2 (click to expand)


  • Sessions-related attacks
  • Basic Fixation attacks
  • Two-step Fixation attacks
  • How to prevent Hijacking attacks
  • How to mitigate Hijacking attacks
  • One-time tokens
  • Session access timeout
  • Virtual Sessions
  • Sessions configuration
  • Quiz

Chapter 3 (click to expand)


  • What is an XSS attack?
  • Reflected and Stored XSS
  • How to prevent XSS attacks
  • HTML elements and sanitization
  • URLs sanitization
  • Nested contexts
  • Further steps
  • Quiz

Chapter 4 (click to expand)


  • Introduction to CSRF
  • How to execute CSRF attacks
  • Anti-CSRF tokens
  • HTML-based tokens
  • Cookie-based tokens
  • Sessions login with samesite strict
  • Custom header tokens
  • Token timeout strategies
  • Login CSRF attacks
  • Referer and Origin headers
  • Stateless double-check tokens
  • Quiz

Chapter 5 (click to expand)


  • File upload security
  • File name validation
  • Extension validation
  • Name collisions
  • Forced file name
  • File size limits
  • File content validation
  • Upload location
  • Database storage
  • Quiz

Appendix (click to expand)


  • Introduction
  • Execution control
  • Information exposure
  • Defense
  • Sessions

Bonus content included in the Pro version


$27 value

Bonus chapter


  • The SQL Injection menace
  • Database connection
  • Destructive attack example
  • Data breach attack example
  • Escaping explained
  • Escaping with MySQLi
  • Escaping with PDO
  • Prepared statements explained
  • Prepared statements with MySQLi
  • Prepared statements with PDO
  • Blind SQL Injections
  • Second order SQL Injections
  • Database permissions
  • Quiz

$22 value

Bonus chapter (click to expand)


  • How to encrypt and store passwords
  • 2-Factor authentication
  • How to control login sessions
  • Password reset
  • Username-based login limiting
  • IP-based login limiting
  • Authentication tips

$13 value

Bonus chapter (click to expand)


  • PHP Exceptions and security
  • Code injection
  • Reverse tabnabbing
  • GET vs POST
  • Type juggling and strict comparison
  • System commands
  • Email injection
  • Code scanners
  • Security principles

Frequently Asked Questions

What is PHP Security Mastery and what will I learn?

PHP Security Mastery is an online course focused on PHP security.

By the end of the course, you will have no more doubts about PHP security. You will be able to write secure PHP code from the ground up and make your existing PHP projects secure.

How long will it take to complete the course?

There is no time limit. You can probably complete the course in about 4 weeks, but you can take as much time as you like.

For how long will I have access to the course?

You will have lifetime access to all the course lessons and bonus material, including future course updates.

Is it a live course? Do I need to show up at a particular time?

You don’t need to show up live. PHP Security Mastery is designed so that you can go at your own pace. If you need to take a break (you are going on vacation, you have a busy time) you won’t miss anything.

All the lessons are always available anytime you want to access them.

I'm a PHP beginner, is this course for me?

The sooner you learn about PHP security, the better. This course does not require any advanced PHP knowledge, and you can learn what you need as you move on through the lessons.

I'm really busy right now, this isn't a great time for me...

PHP Security Mastery is built for busy students and developers. It’s 100% focused on what you really need, so you can save time for yourself.

Plus, you can review the lessons at your own pace.

Isn't my framework already securing my code?

This is a common misconception. While frameworks may help organizing your code, making the code secure it’s always up to you.

Where is the course hosted?

The course is hosted on Teachable, one of the world leading online course platforms.

When do I get access to the course?

As soon as you enroll you will get access to the whole course.

Will I need to pay for an online hosting?

No. You can download a free PHP local development environment to replicate the exercises and test your code.

There are other PHP courses out there. What makes PHP Security Mastery different?

Many PHP courses are confusing and hard to follow. They provide incomplete and unclear lessons, along with too much useless information and theory.

This is why I designed PHP Security Mastery to be crystal clear and easy to follow.
With PHP Security Mastery, you can be sure to get the most out of every lesson and acquire a real skill.

What if this course is not for me?

You are not risking anything. If PHP Security Mastery doesn’t work for you, you’ll get all your money back. You can count on the Teachable full 30-day guarantee (you don’t even need to contact me).

I have another question...

I’m here to answer to all your questions.

You can send me a message using the Messenger widget on the right or you can send me an email at:

30 day money-back guarantee.

Your enrollment is protected by Teachable 30-day, no questions asked money-back guarantee.

You can try the course risk-free. If it doesn’t work for you, you’ll get all your money back.



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