Category: Security Code Snippets

Prevent XSS Attacks. Escape Strings in PHP

Here’s how to prevent XSS attacks by escaping output in PHP: Here’s the code I used in the video: What Is XSS? XSS stands for cross-site scripting and it refers to a type of attack where a hacker injects malicious client-side code into the output of your page. Applications that don’t escape their output are vulnerable to this type of attack. XSS Example A simple example is a blog comment. If not properly escaped, an attacker could enter (for example) JavaScript code into the blog comment. That code would be stored in the database, output to the page when loaded,

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The simple secrets to high-paying freelance clients

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WHAT OTHERS ARE SAYING

Thabo Motsoahae

John is one of the best instructors I have come across, I learned a lot from his online tutorials.

Jim DeJonge

Jim DeJonge

John has a relaxed and engaging manner. His advice is solid and the explanations are well thought out.

Ray Edwards

I recommend John every chance I get. If every person I worked with were as committed to excellence, punctuality, value, and unquestionable integrity… the world would be a better place. Highest recommendation.

Chris Aitken

He significantly improved my site through his expert knowledge of PHP, CSS and Javascript. Would definitely recommend John to others.

Daniel Mohlendick

On the Freelancing on Upwork course: “This is by far the best course i have watched on Skillshare!! Thank you so much.”

Steve Dimmick

Steve Dimmick

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Lewis Howes

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Oliver Wainwright

Oliver Wainwright

I’m a fan. I have completed several of John’s courses. I find him very knowledgeable and he has a great delivery.

Andrew Malone

Andrew Malone

John Morris is exceptional in his ability to give focused insight into Freelancing and starting one’s business. His direct methods inspire confidence in his honesty.

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Xan Barksdale

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Michael Skye

Michael Skye

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Sukh Plaha

John is a fantastic and patient tutor, who is not just able to share knowledge and communicate it very effectively – but able to support one in applying it. However, I believe that John has a very rare ability to go further than just imparting knowledge and showing one how to apply it. He is able to innately provoke one’s curiosity when explaining and demonstrating concepts, to the extent that one can explore and unravel their own learning journey. Thanks very much John!

Aaron Gott

Aaron Gott

John has a particular knack for the development and training of others.