Скачать или смотреть Why is my PNG QR Code Not Displaying in PHP? Fix It with These Simple Steps!

Encountering issues with displaying a PNG QR code in PHP after an XAMPP update? Discover how to resolve the 'undefined function ImageCreate()' error and get your QR codes working again!
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This video is based on the question https://stackoverflow.com/q/68194770/ asked by the user 'Rohit Shidid' ( https://stackoverflow.com/u/13454368/ ) and on the answer https://stackoverflow.com/a/68194862/ provided by the user 'Abdalrahman Valabji' ( https://stackoverflow.com/u/13775396/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Why is My PNG QR Code Not Displaying in PHP? Fix It with These Simple Steps!

Creating QR codes can often be straightforward; however, many developers encounter issues when trying to display PNG images of QR codes, especially after updating software like XAMPP. If you’re facing the error message stating, "Fatal error: Uncaught Error: Call to undefined function ImageCreate()", you're not alone. This guide will guide you through the underlying problem and show you how to resolve it effectively.

Understanding the Problem

The issue arises when the PHP code that generates the QR code relies on the GD library, which is a graphics library used in PHP for creating and manipulating images. After updating to a new version of XAMPP, you might find that the GD library is not enabled by default, leading to the error you've encountered. Specifically, PHP fails to recognize functions like ImageCreate() that are essential for generating images.

Error Details

Here’s a breakdown of the error you might see:

[[See Video to Reveal this Text or Code Snippet]]

This indicates that the GD library, which contains the ImageCreate() function, is either missing or not enabled.

Steps to Resolve the Issue

Fortunately, enabling the GD library in XAMPP is a straightforward process. Follow the steps below to get your QR code images displaying in no time:

Step 1: Locate the php.ini File

Open the XAMPP Control Panel:
Launch the XAMPP control panel on your Windows machine.

Navigate to the PHP Directory:
Find and open the php directory within your XAMPP installation folder (commonly located at C:\xampp\php\).

Find the php.ini File:
In the php directory, locate the php.ini file. This is the configuration file for PHP.

Step 2: Enable the GD Extension

Edit the php.ini File:
Open php.ini in a text editor (like Notepad).

Search for GD Extensions:
Look for the following lines in the file:

[[See Video to Reveal this Text or Code Snippet]]

Remove the Semicolon:
To enable the GD library, remove the semicolon (;) at the beginning of both lines. It should now look like this:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Restart Your Server

After making these changes, it’s important to restart your XAMPP server for the updates to take effect.

Stop the Apache Server:
Go back to the XAMPP Control Panel and click on the "Stop" button next to Apache.

Start the Apache Server:
Once it’s stopped, click "Start" again to restart it.

Conclusion

By following these simple steps, you should be able to resolve the issue of your PNG QR code not displaying due to the GD library being disabled. The process of enabling extensions like GD in PHP is essential when updating software environments, as some configurations can change, leading to such errors. Now you're ready to generate and display QR codes without any hitches! Feel free to reach out if you have any questions or if you encounter any other issues. Happy coding!