What Does It Mean When the imagecolorclosesthwb Function Returns -1? Common Reasons for This Result Explained

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<p><h1>What Does It Mean When imagecolorclosesthwb Returns -</span>1<span>? Common Reasons for This Result</h1></p>
<p><p>In PHP, <code>imagecolorclosesthwb

Conclusion

When imagecolorclosesthwb returns -1, it means no suitable color index was found. The most common reasons are that the image is not palette-based or the image resource is invalid. By verifying the image type, input parameter ranges, and environment versions, these issues can usually be avoided.