PHP imagecolorallocate function

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imagecolorallocate

(PHP 3, PHP 4, PHP 5)

Returns a color identifier representing the color composed of the given
RGB components.

imagecolorallocate() must be called
to create each color that is to be used in the image represented
by image.

Note:
The first call to imagecolorallocate() fills
the background color in palette-based images – images created using
imagecreate().

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

Value of red component

Value of green component

Value of blue component

A color identifier or FALSE if the allocation failed.

Example 1. imagecolorallocate() example

 
$im = imagecreate(100, 100);
 
// sets background to red
$background = imagecolorallocate($im, 255, 0, 0);
 
// sets some colors
$white = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
 
// hexadecimal way
$white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
$black = imagecolorallocate($im, 0x00, 0x00, 0x00);