imagecolorclosestalpha

PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8
imagecolorclosestalpha - Get the index of the closest color to the specified color + alpha
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imagecolorclosestalpha( GdImage$image, int$red, int$green, int$blue, int$alpha ): int

Returns the index of the color in the palette of the image which is "closest" to the specified RGB value and alpha level.

Parameters

image

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor.

red

Value of red component.

green

Value of green component.

blue

Value of blue component.

alpha

A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Related Functions

Example of imagecolorclosestalpha

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<?php
// Start with an image and convert it to a palette-based image
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Function imagecolorclosestalpha:

Image Processing and GD Functions

Most used PHP functions