PHP imagecolormatch Function: Matching Palette Colors to True‑Color Images
The article explains PHP's imagecolormatch function, detailing its purpose of aligning palette colors with true‑color images, outlines required parameters, return values, and provides a complete PHP example using GD library functions to demonstrate usage and cleanup.
PHP provides the imagecolormatch function to adjust the colors of a palette‑based image so that they more closely match those of a true‑color image.
Signature: bool imagecolormatch(resource $image1, resource $image2)
Parameters:
$image1 – a true‑color image resource.
$image2 – a palette image resource that must have the same dimensions as $image1 .
Return value: Returns TRUE on success or FALSE on failure.
Example usage:
This example creates a true‑color image and a same‑size palette image, allocates several colors to the palette image, calls imagecolormatch to align the colors, and finally releases the resources.
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