imagelayereffect Warning: Incompatible image resource type? How to avoid this error?

gitbox 2025-08-14

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<p>echo <span><span class="hljs-string">"<p>When working with PHP's GD library for image processing, you may often encounter an <code>imagelayereffect

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5. Additional tips

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In PHP 8.0 and later, the GD library increasingly encourages the object-oriented API, with resources being gradually replaced by class objects. It’s recommended to adopt the new image processing classes going forward to avoid relying on old functions that require resources. If you must use imagelayereffect(), ensure the argument you pass is indeed a resource.

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In summary, the “incompatible image resource type” error usually occurs because the parameter passed is not a valid GD image resource. By strictly checking and ensuring parameters are correct, you can avoid this issue.

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