What potential issue could cause the ImageCopyResized function to make the image turn red?

The potential issue that could cause the ImageCopyResized function to make the image turn red is when the image resource is not properly created or loaded before resizing. This can result in a corrupted image resource, leading to unexpected color changes like turning the image red. To solve this issue, ensure that the image resource is properly created or loaded using functions like imagecreatefromjpeg() or imagecreatefrompng() before using ImageCopyResized. 

// Load the original image resource
$src = imagecreatefromjpeg('original.jpg');

// Create a blank image resource with the desired dimensions
$dst = imagecreatetruecolor($new_width, $new_height);

// Resize the original image to the new dimensions
imagecopyresized($dst, $src, 0, 0, 0, 0, $new_width, $new_height, $original_width, $original_height);

// Output or save the resized image
imagejpeg($dst, 'resized.jpg');

// Free up memory by destroying the image resources
imagedestroy($src);
imagedestroy($dst);

Keywords

ImageCopyResized red image color distortion GD library image processing

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