By default, you will get black background if you resize a transparent image. To fix it, you need set alpha channel imagecolorallocatealpha to 127. With imagecolorallocatealpha, it will allocate a color for an image. Usage: int imagecolorallocatealpha ( resource image, int red, int green, int blue, int alpha) From PHP manual: imagecolorallocatealpha() behaves identically to […]
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