(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.
image
imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.
index
An index in the palette.
red
Red 컴포넌트 값.
green
Green 컴포넌트 값.
blue
Blue 컴포넌트 값.
alpha
Value 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);
?>