imagecolorallocate
(PHP 3, PHP 4, PHP 5)
imagecolorallocate -- Allocate a color for an image
Description
int
imagecolorallocate ( resource image, int red, int green, int blue )
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().
Parameters
imageAn image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().
red
Value of red component
green
Value of green component
blue
Value of blue component
These parameters are integers between 0 and 255 or hexadecimals between
0x00 and 0xFF.
Return Values
A color identifier or FALSE if the allocation failed.
Examples
Example 1. imagecolorallocate() example
<?php
$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);
?>
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