How to Fix: IIS 8.5 PHP 5.6.2 x64 Fatal error: Allowed memory size of... if imagick is enabled

The IIS 8.5 PHP 5.6.2 x64 Fatal error: Allowed memory size of... if imagick is enabled occurs when the Imagick extension is enabled in PHP, causing a memory exhaustion error. This issue affects users who have upgraded from PHP 5.6.2 x86 to x64 (nts) on IIS 8.5 and are experiencing problems with the Imagick extension.

This frustration can be attributed to the fact that the upgrade from x86 to x64 architecture has led to a change in how memory is allocated, which can cause issues with certain extensions like Imagick. By following the steps outlined below, users can resolve this issue and ensure smooth operation of their PHP applications.

🔍 Why This Happens

• The primary reason for this error is that the Imagick extension is not compatible with the x64 architecture of IIS 8.5. This incompatibility leads to memory exhaustion errors when the extension tries to allocate memory.
• An alternative possible cause could be related to the way PHP handles memory allocation, which might be affected by the change from x86 to x64 architecture.

✅ Best Solutions to Fix It

🎯 Final Words

To resolve the IIS 8.5 PHP 5.6.2 x64 Fatal error: Allowed memory size of... if imagick is enabled, it is recommended to follow the steps outlined in Method 1 (Fixing Imagick Extension Compatibility). If this method does not work, you can try adjusting the PHP configuration for memory limit using Method 2 (Adjusting PHP Configuration for Memory Limit). By following these steps, you should be able to resolve the issue and ensure smooth operation of your PHP applications.