GD and Image 함수 목록
PHP Manual

imagecolorallocate

(PHP 4, PHP 5)

imagecolorallocateAllocate a color for an image

설명

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().

인수

image

imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.

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.

반환값

A color identifier or FALSE if the allocation failed.

변경점

버전 설명
Prior to 5.1.3 Returns -1 if the allocation failed.

예제

Example #1 imagecolorallocate() example

<?php

$im 
imagecreate(100100);

// sets background to red
$background imagecolorallocate($im25500);

// sets some colors
$white imagecolorallocate($im255255255);
$black imagecolorallocate($im000);

// hexadecimal way
$white imagecolorallocate($im0xFF0xFF0xFF);
$black imagecolorallocate($im0x000x000x00);

?>

참고


GD and Image 함수 목록
PHP Manual