(PHP 4, PHP 5, PHP 7)
imagecolorset — Set the color for the specified palette index
$image
, int $index
, int $red
, int $green
, int $blue
[, int $alpha = 0
] )This sets the specified index in the palette to the specified color. This is useful for creating flood-fill-like effects in palleted images without the overhead of performing the actual flood-fill.
imageimagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.
indexAn index in the palette.
redRed 컴포넌트 값.
greenGreen 컴포넌트 값.
blueBlue 컴포넌트 값.
alphaValue of alpha component.
값을 반환하지 않습니다.
| 버전 | 설명 |
|---|---|
| 5.4.0 |
The alpha parameter was added.
|
Example #1 imagecolorset() example
<?php
// Create a 300x100 image
$im = imagecreate(300, 100);
// Set the background to be red
imagecolorallocate($im, 255, 0, 0);
// Get the color index for the background
$bg = imagecolorat($im, 0, 0);
// Set the backgrund to be blue
imagecolorset($im, $bg, 0, 0, 255);
// Output the image to the browser
header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);
?>