PHP imagecolorresolvealpha Function: Retrieve Color Index with Alpha
The PHP GD library function imagecolorresolvealpha returns the index of a specified color with an alpha value for a given image resource, delivering either the exact index or the nearest possible alternative while detailing its parameters, return values, and usage example.
The imagecolorresolvealpha function in PHP's GD library returns the index of a color with a specified alpha value for a given image resource, providing either the exact color index or the closest possible alternative.
Parameters
$image – an image resource created by functions such as imagecreatetruecolor() .
$red , $green , $blue – integer values for the red, green, and blue components.
$alpha – an integer between 0 and 127 representing the alpha channel.
Return value
Returns TRUE on success (the color index) or FALSE on failure.
Example
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