PHP imagecolortransparent function

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imagecolortransparent

(PHP 3, PHP 4, PHP 5)

imagecolortransparent — Define a color as transparentDescriptionint imagecolortransparent ( resource image [, int color] )

Sets the transparent color in the given image.

Parameters

image

An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().

color

A color identifier created with
imagecolorallocate()

Return Values

The identifier of the new (or current, if none is specified)
transparent color is returned.

Notes

Note:
Transparency is copied only with imagecopymerge() and
true color images, not with imagecopy() or pallete images.

Note:
The transparent color is a property of the image, transparency is not a
property of the color. Once you have set a color to be the transparent
color, any regions of the image in that color that were drawn previously
will be transparent.