PHP imagecolorsforindex – Retrieve RGBA Components for a Color Index
The article explains PHP’s imagecolorsforindex function, detailing its purpose, parameters, return values, and provides a complete example demonstrating how to load an image, retrieve a pixel’s color index, convert it to RGBA components, and output the result.
The imagecolorsforindex function returns an associative array with keys red , green , blue , and alpha that represent the RGBA components of a specified color index in an image resource.
Parameters
image : The image resource returned by an image creation function such as imagecreatetruecolor() .
index : The color index whose RGBA values are to be retrieved.
Return value
On success the function returns an array with the RGBA components; on failure it returns FALSE .
Example
';
print_r($color_tran);
echo ''; ?>
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