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(PHP 3, PHP 4, PHP 5)

imagecolorallocate -- Allocate a color for an image

Description

int imagecolorallocate ( resource image, int red, int green, int blue )

imagecolorallocate() returns a color identifier representing the color composed of the given RGB components. The image argument is the return from the imagecreate() function. red , green and blue are the values of the red, green and blue component of the requested color respectively. These parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF. imagecolorallocate() must be called to create each color that is to be used in the image represented by image .

<?php

// 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);

?>

Returns -1 if the allocation failed.

Related Function(s)

imagecreate()

imagecolorallocatealpha()

imagecolordeallocate()