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returns the index of the color in the palette of the image which is "closest" to the specified rgb value and alpha level.
returns the index of the color in the palette of the image which is "closest" to the specified rgb value and alpha level.
imagecolorallocatealpha() behaves identically to imagecolorallocate() with the addition of the transparency parameter alpha which may have a value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
0 indicates completely opaque while 127 indicates completely transparent.