imagecolorresolvealpha

PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8
imagecolorresolvealpha - Get the index of the specified color + alpha or its closest possible alternative
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Code Examples

imagecolorresolvealpha( GdImage$image, int$red, int$green, int$blue, int$alpha ): int

This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.

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 a color index.

Changelog

Version Description
8.0.0 image expects a GdImage instance now; previously, a resource was expected.

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Image Processing and GD Functions

Most used PHP functions